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ECS UMN 20260514 version. Added X1m instance specifications.

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Reviewed-by: Pristromskaia, Margarita <margarita.pristromskaia@t-systems.com>
Co-authored-by: wanghuijuan738 <wanghuijuan738@huawei.com>
Co-committed-by: wanghuijuan738 <wanghuijuan738@huawei.com>
This commit is contained in:
Huijuan, Wang
2026-05-18 09:03:42 +00:00
committed by zuul
parent 4304fed907
commit 8f01f116a5
27 changed files with 1227 additions and 885 deletions
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"node_id":"en-us_topic_0035550301.xml",
"product_code":"ecs",
"code":"11",
"des":"M9 ECSs use the sixth-generation Intel® Xeon® Scalable processors and KVM virtualization to provide enhanced compute, network, and security performance to fulfill the hig",
"des":"X1m ECSs are built on the KVM virtualization platform and designed for processing large-scale datasets in memory. They use Intel® Xeon® Scalable processors, network accel",
"doc_type":"usermanual",
"kw":"Memory-optimized ECSs,ECS Specifications,User Guide",
"search_title":"",

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"code":"10"
},
{
"desc":"M9 ECSs use the sixth-generation Intel® Xeon® Scalable processors and KVM virtualization to provide enhanced compute, network, and security performance to fulfill the hig",
"desc":"X1m ECSs are built on the KVM virtualization platform and designed for processing large-scale datasets in memory. They use Intel® Xeon® Scalable processors, network accel",
"product_code":"ecs",
"title":"Memory-optimized ECSs",
"uri":"en-us_topic_0035550301.html",

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<div class="p" id="EN-US_TOPIC_0000001128604648__p1852521716489">You can back up ECS data using cloud server backup or cloud disk backup.<ul id="EN-US_TOPIC_0000001128604648__ul18366112610528"><li id="EN-US_TOPIC_0000001128604648__li16366926185213">Cloud server backup (recommended): Use this backup function if you want to back up the data of all EVS disks (system and data disks) on an ECS. This prevents data inconsistency caused by time difference in creating a backup.</li><li id="EN-US_TOPIC_0000001128604648__li6193532193917">Cloud disk backup: Use this backup function if you want to back up the data of one or more EVS disks (system or data disk) on an ECS. This minimizes backup costs on the basis of data security.</li></ul>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001128604648__section1685231310443"><h4 class="sectiontitle">ECS Backup Procedure</h4><ol id="EN-US_TOPIC_0000001128604648__ol147701510184519"><li id="EN-US_TOPIC_0000001128604648__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0000001128604648__li464234814566">Click <span><img id="EN-US_TOPIC_0000001128604648__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0000001128604648__li1654693454617">Under <strong id="EN-US_TOPIC_0000001128604648__b590135893419"><span id="EN-US_TOPIC_0000001128604648__text4891058103416">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001128604648__b159120588341">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001128604648__li113648682416">In the ECS list, locate the target ECS and choose <strong id="EN-US_TOPIC_0000001128604648__b086483084910">More</strong> &gt; <strong id="EN-US_TOPIC_0000001128604648__b1486413024920">Manage Image/Backup</strong> &gt; <strong id="EN-US_TOPIC_0000001128604648__b9864630184920">Create Server Backup</strong> in the <strong id="EN-US_TOPIC_0000001128604648__b138641330184914">Operation</strong> column.<ul id="EN-US_TOPIC_0000001128604648__ul4315152019362"><li id="EN-US_TOPIC_0000001128604648__li12315220163611">If the ECS has been associated with a vault, configure the backup information as instructed.<ul id="EN-US_TOPIC_0000001128604648__ul74118744418"><li id="EN-US_TOPIC_0000001128604648__li164287184411"><strong id="EN-US_TOPIC_0000001128604648__b202814143119">Server List</strong>: The ECS to be backed up is selected by default.</li><li id="EN-US_TOPIC_0000001128604648__li104214713447"><strong id="EN-US_TOPIC_0000001128604648__b674664614184">Name</strong>: Customize your backup name.</li><li id="EN-US_TOPIC_0000001128604648__li134214754413"><strong id="EN-US_TOPIC_0000001128604648__b1343010551187">Description</strong>: Supplementary information about the backup.</li><li id="EN-US_TOPIC_0000001128604648__li1421372447"><strong id="EN-US_TOPIC_0000001128604648__b751514566356">Full Backup</strong>: If this option is selected, the system will perform full backup for the ECS to be associated. The storage capacity used by the backup increases accordingly.</li></ul>
<div class="section" id="EN-US_TOPIC_0000001128604648__section1685231310443"><h4 class="sectiontitle">ECS Backup Procedure</h4><ol id="EN-US_TOPIC_0000001128604648__ol147701510184519"><li id="EN-US_TOPIC_0000001128604648__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0000001128604648__li464234814566">Click <span><img id="EN-US_TOPIC_0000001128604648__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0000001128604648__li1654693454617">Under <strong id="EN-US_TOPIC_0000001128604648__b162119594715"><span id="EN-US_TOPIC_0000001128604648__text1121117534713">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001128604648__b6211175134719">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001128604648__li113648682416">In the ECS list, locate the target ECS and choose <strong id="EN-US_TOPIC_0000001128604648__b086483084910">More</strong> &gt; <strong id="EN-US_TOPIC_0000001128604648__b1486413024920">Manage Image/Backup</strong> &gt; <strong id="EN-US_TOPIC_0000001128604648__b9864630184920">Create Server Backup</strong> in the <strong id="EN-US_TOPIC_0000001128604648__b138641330184914">Operation</strong> column.<ul id="EN-US_TOPIC_0000001128604648__ul4315152019362"><li id="EN-US_TOPIC_0000001128604648__li12315220163611">If the ECS has been associated with a vault, configure the backup information as instructed.<ul id="EN-US_TOPIC_0000001128604648__ul74118744418"><li id="EN-US_TOPIC_0000001128604648__li164287184411"><strong id="EN-US_TOPIC_0000001128604648__b202814143119">Server List</strong>: The ECS to be backed up is selected by default.</li><li id="EN-US_TOPIC_0000001128604648__li104214713447"><strong id="EN-US_TOPIC_0000001128604648__b674664614184">Name</strong>: Customize your backup name.</li><li id="EN-US_TOPIC_0000001128604648__li134214754413"><strong id="EN-US_TOPIC_0000001128604648__b1343010551187">Description</strong>: Supplementary information about the backup.</li><li id="EN-US_TOPIC_0000001128604648__li1421372447"><strong id="EN-US_TOPIC_0000001128604648__b751514566356">Full Backup</strong>: If this option is selected, the system will perform full backup for the ECS to be associated. The storage capacity used by the backup increases accordingly.</li></ul>
</li><li id="EN-US_TOPIC_0000001128604648__li1523293617363">If the ECS is not associated with a vault, buy a vault first and then configure the backup information as instructed.<p id="EN-US_TOPIC_0000001128604648__p1329123410377"><a name="EN-US_TOPIC_0000001128604648__li1523293617363"></a><a name="li1523293617363"></a>For details, see <a href="https://docs.otc.t-systems.com/cloud-backup-recovery/umn/getting_started/step_1_create_a_vault/creating_a_server_backup_vault.html" target="_blank" rel="noopener noreferrer">Creating a Server Backup Vault</a>.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0000001128604648__li175591309446">Click <strong id="EN-US_TOPIC_0000001128604648__b354222122517">OK</strong>. The system automatically creates a backup for the ECS.<p id="EN-US_TOPIC_0000001128604648__p1805632194414">On the <strong id="EN-US_TOPIC_0000001128604648__b873775316237">Backups</strong> tab, if the status of the backup is <strong id="EN-US_TOPIC_0000001128604648__b7936121217409">Available</strong>, the backup task is successful.</p>
<p id="EN-US_TOPIC_0000001128604648__p12791616192815">The ECS can be restarted if the backup progress of an ECS exceeds 10%. However, to ensure data integrity, restart the ECS only after the backup is complete.</p>
<p id="EN-US_TOPIC_0000001128604648__p16816105810355">After the backup is complete, you can restore server data or create images on the <strong id="EN-US_TOPIC_0000001128604648__b66501922142514">Backups</strong> tab page. For details, see <a href="https://docs.otc.t-systems.com/en-us/usermanual/cbr/cbr_03_0032.html" target="_blank" rel="noopener noreferrer">Restoring from a Cloud Server Backup</a> and <a href="https://docs.otc.t-systems.com/en-us/usermanual/cbr/cbr_03_0016.html" target="_blank" rel="noopener noreferrer">Creating an Image from a Cloud Server Backup</a>.</p>
<p id="EN-US_TOPIC_0000001128604648__p16816105810355">After the backup is complete, you can restore server data or create images on the <strong id="EN-US_TOPIC_0000001128604648__b19488226154716">Backups</strong> tab. For details, see <a href="https://docs.otc.t-systems.com/en-us/usermanual/cbr/cbr_03_0032.html" target="_blank" rel="noopener noreferrer">Restoring from a Cloud Server Backup</a> and <a href="https://docs.otc.t-systems.com/en-us/usermanual/cbr/cbr_03_0016.html" target="_blank" rel="noopener noreferrer">Creating an Image from a Cloud Server Backup</a>.</p>
</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0000001128604648__section7890518132019"><h4 class="sectiontitle">EVS Disk Backup Procedure</h4><ol id="EN-US_TOPIC_0000001128604648__ol17890418192017"><li id="EN-US_TOPIC_0000001128604648__li139921586245">Log in to the management console.</li><li id="EN-US_TOPIC_0000001128604648__li7890171852016">Click <span><img id="EN-US_TOPIC_0000001128604648__en-us_topic_0000001825604541_image9499446838_1" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0000001128604648__li68901818132010">Under <strong id="EN-US_TOPIC_0000001128604648__b14583131103615"><span id="EN-US_TOPIC_0000001128604648__text20583811163610">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001128604648__b16583121114364">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001128604648__li138904183204">In the ECS list, locate the target ECS and choose <strong id="EN-US_TOPIC_0000001128604648__b8904171983618">More</strong> &gt; <strong id="EN-US_TOPIC_0000001128604648__b129041119123619">Manage Image/Backup</strong> &gt; <strong id="EN-US_TOPIC_0000001128604648__b16904101914368">Create Disk Backup</strong>.<ul id="EN-US_TOPIC_0000001128604648__ul10890418122011"><li id="EN-US_TOPIC_0000001128604648__li28901318112015">If the ECS has been associated with a vault, configure the backup information as instructed.<ul id="EN-US_TOPIC_0000001128604648__ul12890418122010"><li id="EN-US_TOPIC_0000001128604648__li128901518102012"><strong id="EN-US_TOPIC_0000001128604648__b37041744163615">Server List</strong>: The ECS to be backed up is selected by default. Click <span><img id="EN-US_TOPIC_0000001128604648__image53598395422" src="en-us_image_0000001128656892.png" title="Click to enlarge" class="imgResize"></span> to view the disks attached to the ECSs. Select the disks to be backed up.</li><li id="EN-US_TOPIC_0000001128604648__li1789016180208"><strong id="EN-US_TOPIC_0000001128604648__b51371052134118">Name</strong>: Customize your backup name.</li><li id="EN-US_TOPIC_0000001128604648__li168901718172014"><strong id="EN-US_TOPIC_0000001128604648__b106911853174116">Description</strong>: Supplementary information about the backup.</li><li id="EN-US_TOPIC_0000001128604648__li1489017189204"><strong id="EN-US_TOPIC_0000001128604648__b18291318162117">Full Backup</strong>: If this option is selected, the system will perform full backup for the disks to be associated. The storage capacity used by the backup increases accordingly.</li></ul>
<div class="section" id="EN-US_TOPIC_0000001128604648__section7890518132019"><h4 class="sectiontitle">EVS Disk Backup Procedure</h4><ol id="EN-US_TOPIC_0000001128604648__ol17890418192017"><li id="EN-US_TOPIC_0000001128604648__li139921586245">Log in to the management console.</li><li id="EN-US_TOPIC_0000001128604648__li7890171852016">Click <span><img id="EN-US_TOPIC_0000001128604648__en-us_topic_0000001825604541_image9499446838_1" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0000001128604648__li68901818132010">Under <strong id="EN-US_TOPIC_0000001128604648__b49766301489"><span id="EN-US_TOPIC_0000001128604648__text69763307481">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001128604648__b79761302489">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001128604648__li138904183204">In the ECS list, locate the target ECS and choose <strong id="EN-US_TOPIC_0000001128604648__b8904171983618">More</strong> &gt; <strong id="EN-US_TOPIC_0000001128604648__b129041119123619">Manage Image/Backup</strong> &gt; <strong id="EN-US_TOPIC_0000001128604648__b16904101914368">Create Disk Backup</strong>.<ul id="EN-US_TOPIC_0000001128604648__ul10890418122011"><li id="EN-US_TOPIC_0000001128604648__li28901318112015">If the ECS has been associated with a vault, configure the backup information as instructed.<ul id="EN-US_TOPIC_0000001128604648__ul12890418122010"><li id="EN-US_TOPIC_0000001128604648__li128901518102012"><strong id="EN-US_TOPIC_0000001128604648__b37041744163615">Server List</strong>: The ECS to be backed up is selected by default. Click <span><img id="EN-US_TOPIC_0000001128604648__image53598395422" src="en-us_image_0000001128656892.png" title="Click to enlarge" class="imgResize"></span> to view the disks attached to the ECSs. Select the disks to be backed up.</li><li id="EN-US_TOPIC_0000001128604648__li1789016180208"><strong id="EN-US_TOPIC_0000001128604648__b51371052134118">Name</strong>: Customize your backup name.</li><li id="EN-US_TOPIC_0000001128604648__li168901718172014"><strong id="EN-US_TOPIC_0000001128604648__b106911853174116">Description</strong>: Supplementary information about the backup.</li><li id="EN-US_TOPIC_0000001128604648__li1489017189204"><strong id="EN-US_TOPIC_0000001128604648__b18291318162117">Full Backup</strong>: If this option is selected, the system will perform full backup for the disks to be associated. The storage capacity used by the backup increases accordingly.</li></ul>
</li><li id="EN-US_TOPIC_0000001128604648__li6890201892017">If the ECS is not associated with a vault, buy a vault first and then configure the backup information as instructed.<p id="EN-US_TOPIC_0000001128604648__p1513210104020"><a name="EN-US_TOPIC_0000001128604648__li6890201892017"></a><a name="li6890201892017"></a>For details, see <a href="https://docs.otc.t-systems.com/cloud-backup-recovery/umn/getting_started/step_1_create_a_vault/creating_a_disk_backup_vault.html" target="_blank" rel="noopener noreferrer">Creating a Disk Backup Vault</a>.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0000001128604648__li8890131812012">Click <strong id="EN-US_TOPIC_0000001128604648__b538510218222">OK</strong>. The system automatically creates a backup for the disk.<p id="EN-US_TOPIC_0000001128604648__p2890171817207">On the <strong id="EN-US_TOPIC_0000001128604648__b4491143114115">Backups</strong> tab of the <span id="EN-US_TOPIC_0000001128604648__text128969391438">CBR</span> console, if the status of the backup is <strong id="EN-US_TOPIC_0000001128604648__b587482084312">Available</strong>, the backup task is successful.</p>
<p id="EN-US_TOPIC_0000001128604648__p12890141814206">If some files are deleted from the disk during the backup, the deleted files may fail to be backed up. Therefore, to ensure data integrity, delete the target data after the backup is complete.</p>
<p id="EN-US_TOPIC_0000001128604648__p159598363520">After the backup is complete, you can restore disk data on the <strong id="EN-US_TOPIC_0000001128604648__b5263133492118">Backups</strong> tab page. For details, see <a href="https://docs.otc.t-systems.com/cloud-backup-recovery/umn/restoring_data/restoring_from_a_cloud_disk_backup.html" target="_blank" rel="noopener noreferrer">Restoring from a Cloud Disk Backup</a>.</p>
<p id="EN-US_TOPIC_0000001128604648__p159598363520">After the backup is complete, you can restore disk data on the <strong id="EN-US_TOPIC_0000001128604648__b5263133492118">Backups</strong> tab. For details, see <a href="https://docs.otc.t-systems.com/cloud-backup-recovery/umn/restoring_data/restoring_from_a_cloud_disk_backup.html" target="_blank" rel="noopener noreferrer">Restoring from a Cloud Disk Backup</a>.</p>
</li></ol>
</div>
</div>

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<ul id="EN-US_TOPIC_0027157850__ul393674685015"><li id="EN-US_TOPIC_0027157850__li493684695010">A proxy <span id="EN-US_TOPIC_0027157850__text1591103812147">ECS</span> with an EIP bound is available.</li><li id="EN-US_TOPIC_0027157850__li1893618464506">The IP address of the proxy <span id="EN-US_TOPIC_0027157850__text1593210161541">ECS</span> is in the same network and same security group as the <span id="EN-US_TOPIC_0027157850__text493219161417">ECS</span>s that need to access the Internet.</li></ul>
</div></div>
<p id="EN-US_TOPIC_0027157850__p0785184312445">The following uses CentOS 7.9 as an example. The operations apply to CentOS 7.9 and earlier versions.</p>
<ol id="EN-US_TOPIC_0027157850__ol33320884113959"><li id="EN-US_TOPIC_0027157850__li122620566157">Log in to the management console.</li><li id="EN-US_TOPIC_0027157850__li464234814566">Click <span><img id="EN-US_TOPIC_0027157850__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0027157850__li46924084113959">Under <strong id="EN-US_TOPIC_0027157850__b510317620405"><span id="EN-US_TOPIC_0027157850__text15103463404">Computing</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b12103186114015">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0027157850__li42754441113959">In the search box above the <span id="EN-US_TOPIC_0027157850__text6178154220399">ECS</span> list, enter the proxy <span id="EN-US_TOPIC_0027157850__text6468125715118">ECS</span> name for search.</li><li id="EN-US_TOPIC_0027157850__li49245655113959">Click the name of the proxy <span id="EN-US_TOPIC_0027157850__text12726205213110">ECS</span>. The <span id="EN-US_TOPIC_0027157850__text372655215115">ECS</span> details page is displayed.</li><li id="EN-US_TOPIC_0027157850__li38671581113959">On the <strong id="EN-US_TOPIC_0027157850__b187181585409">Network Interfaces</strong> tab, click <span><img id="EN-US_TOPIC_0027157850__image16740174871" src="en-us_image_0128851717.png"></span>. Then, disable <strong id="EN-US_TOPIC_0027157850__b171814894016">Source/Destination Check</strong>.<div class="fignone" id="EN-US_TOPIC_0027157850__fig2463867272"><span class="figcap"><b>Figure 1 </b>Disabling source/destination check</span><br><span><img id="EN-US_TOPIC_0027157850__image157411013104211" src="en-us_image_0000002385324601.png" title="Click to enlarge" class="imgResize"></span></div>
<ol id="EN-US_TOPIC_0027157850__ol33320884113959"><li id="EN-US_TOPIC_0027157850__li122620566157">Log in to the management console.</li><li id="EN-US_TOPIC_0027157850__li464234814566">Click <span><img id="EN-US_TOPIC_0027157850__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0027157850__li46924084113959">Under <strong id="EN-US_TOPIC_0027157850__b208621961619"><span id="EN-US_TOPIC_0027157850__text16862765619">Computing</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b1786219611613">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0027157850__li42754441113959">In the search box above the <span id="EN-US_TOPIC_0027157850__text6178154220399">ECS</span> list, enter the proxy <span id="EN-US_TOPIC_0027157850__text6468125715118">ECS</span> name for search.</li><li id="EN-US_TOPIC_0027157850__li49245655113959">Click the name of the proxy <span id="EN-US_TOPIC_0027157850__text12726205213110">ECS</span>. The <span id="EN-US_TOPIC_0027157850__text372655215115">ECS</span> details page is displayed.</li><li id="EN-US_TOPIC_0027157850__li38671581113959">On the <strong id="EN-US_TOPIC_0027157850__b187181585409">Network Interfaces</strong> tab, click <span><img id="EN-US_TOPIC_0027157850__image16740174871" src="en-us_image_0128851717.png"></span>. Then, disable <strong id="EN-US_TOPIC_0027157850__b171814894016">Source/Destination Check</strong>.<div class="fignone" id="EN-US_TOPIC_0027157850__fig2463867272"><span class="figcap"><b>Figure 1 </b>Disabling source/destination check</span><br><span><img id="EN-US_TOPIC_0027157850__image157411013104211" src="en-us_image_0000002385324601.png" title="Click to enlarge" class="imgResize"></span></div>
<p id="EN-US_TOPIC_0027157850__p1846151153411">By default, the source/destination check function is enabled. When this function is enabled, the system checks whether source IP addresses contained in the packets sent by <span id="EN-US_TOPIC_0027157850__text159541444113919">ECS</span>s are correct. If the IP addresses are incorrect, the system does not allow the <span id="EN-US_TOPIC_0027157850__text16431453151110">ECS</span>s to send the packets. This mechanism prevents packet spoofing, thereby improving system security. However, this mechanism prevents the packet sender from receiving returned packets. Therefore, disable the source/destination check.</p>
</li><li id="EN-US_TOPIC_0027157850__li5860308113959">Log in to the proxy <span id="EN-US_TOPIC_0027157850__text7842746163912">ECS</span>.<p id="EN-US_TOPIC_0027157850__p45390388113959">For more details, see <a href="en-us_topic_0013771089.html">Login Overview (Linux)</a>.</p>
</li><li id="EN-US_TOPIC_0027157850__li32041953113959">Check whether the proxy <span id="EN-US_TOPIC_0027157850__text525035053916">ECS</span> can access the Internet.<p id="EN-US_TOPIC_0027157850__p4922924113959"><strong id="EN-US_TOPIC_0027157850__b52742774113959">ping www.google.com</strong></p>
@ -43,7 +43,7 @@
</li><li id="EN-US_TOPIC_0027157850__li47056383113959">Check whether SNAT has been configured.<p id="EN-US_TOPIC_0027157850__p43562301113959"><a name="EN-US_TOPIC_0027157850__li47056383113959"></a><a name="li47056383113959"></a><strong id="EN-US_TOPIC_0027157850__b42122957113959">iptables -t nat --list</strong></p>
<p id="EN-US_TOPIC_0027157850__p38885512113959">SNAT has been configured if information similar to <a href="#EN-US_TOPIC_0027157850__fig27598108113959">Figure 2</a> is displayed.</p>
<div class="fignone" id="EN-US_TOPIC_0027157850__fig27598108113959"><a name="EN-US_TOPIC_0027157850__fig27598108113959"></a><a name="fig27598108113959"></a><span class="figcap"><b>Figure 2 </b>Successful SNAT configuration</span><br><span><img id="EN-US_TOPIC_0027157850__image62718780113959" src="en-us_image_0027174005.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0027157850__li66936514113959">Add a route.<ol type="a" id="EN-US_TOPIC_0027157850__ol52176633113959"><li id="EN-US_TOPIC_0027157850__li219527171617">Log in to the management console.</li><li id="EN-US_TOPIC_0027157850__li7951089219">Click <span><img id="EN-US_TOPIC_0027157850__en-us_topic_0000001825604541_image9499446838_1" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0027157850__li53470716113959">Under <strong id="EN-US_TOPIC_0027157850__b842352706161257"><span id="EN-US_TOPIC_0027157850__text159160124215">Network</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b842352706161254">Virtual Private Cloud</strong>.</li><li id="EN-US_TOPIC_0027157850__li11474399113959">Choose <strong id="EN-US_TOPIC_0027157850__b18105111173">Route Tables</strong> in the left navigation pane. In the route table list, click a target route table. On the displayed page, click <strong id="EN-US_TOPIC_0027157850__b73147752173149">Add Route</strong>.</li><li id="EN-US_TOPIC_0027157850__li20710484113959">Set route information on the displayed page.<ul id="EN-US_TOPIC_0027157850__ul54496948113959"><li id="EN-US_TOPIC_0027157850__li36160729113959"><strong id="EN-US_TOPIC_0027157850__b63178015">Destination</strong>: indicates the destination network segment. The default value is <strong id="EN-US_TOPIC_0027157850__b226282777">0.0.0.0/0</strong>.</li><li id="EN-US_TOPIC_0027157850__li43337918113959"><strong id="EN-US_TOPIC_0027157850__b378033300">Next Hop</strong>: indicates the private IP address of the proxy <span id="EN-US_TOPIC_0027157850__text315972508">ECS</span>.<p id="EN-US_TOPIC_0027157850__p57011107113959">You can obtain the private IP address of the <span id="EN-US_TOPIC_0027157850__text48821157123917">ECS</span> on the <strong id="EN-US_TOPIC_0027157850__b11550213161515">Elastic Cloud Server</strong> page.</p>
</li><li id="EN-US_TOPIC_0027157850__li66936514113959">Add a route.<ol type="a" id="EN-US_TOPIC_0027157850__ol52176633113959"><li id="EN-US_TOPIC_0027157850__li219527171617">Log in to the management console.</li><li id="EN-US_TOPIC_0027157850__li7951089219">Click <span><img id="EN-US_TOPIC_0027157850__en-us_topic_0000001825604541_image9499446838_1" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0027157850__li53470716113959">Under <strong id="EN-US_TOPIC_0027157850__b842352706161257"><span id="EN-US_TOPIC_0027157850__text159160124215">Network</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b842352706161254">Virtual Private Cloud</strong>.</li><li id="EN-US_TOPIC_0027157850__li11474399113959">Choose <strong id="EN-US_TOPIC_0027157850__b18105111173">Route Tables</strong> in the left navigation pane. In the route table list, click a target route table. On the displayed page, click <strong id="EN-US_TOPIC_0027157850__b73147752173149">Add Route</strong>.</li><li id="EN-US_TOPIC_0027157850__li20710484113959">Set route information on the displayed page.<ul id="EN-US_TOPIC_0027157850__ul54496948113959"><li id="EN-US_TOPIC_0027157850__li36160729113959"><strong id="EN-US_TOPIC_0027157850__b1499919441">Destination</strong>: indicates the destination network segment. The default value is <strong id="EN-US_TOPIC_0027157850__b1801572931">0.0.0.0/0</strong>.</li><li id="EN-US_TOPIC_0027157850__li43337918113959"><strong id="EN-US_TOPIC_0027157850__b1390293312">Next Hop</strong>: indicates the private IP address of the proxy <span id="EN-US_TOPIC_0027157850__text1913768379">ECS</span>.<p id="EN-US_TOPIC_0027157850__p57011107113959">You can obtain the private IP address of the <span id="EN-US_TOPIC_0027157850__text48821157123917">ECS</span> on the <strong id="EN-US_TOPIC_0027157850__b11550213161515">Elastic Cloud Server</strong> page.</p>
</li></ul>
</li></ol>
</li><li id="EN-US_TOPIC_0027157850__li8776155274817">Delete the added iptables rules as needed.<p id="EN-US_TOPIC_0027157850__p237194319550"><a name="EN-US_TOPIC_0027157850__li8776155274817"></a><a name="li8776155274817"></a><strong id="EN-US_TOPIC_0027157850__b113917801813">iptables -t nat -D POSTROUTING -o eth0 -s</strong> <em id="EN-US_TOPIC_0027157850__i8372144335512">subnet/netmask-bits</em> <strong id="EN-US_TOPIC_0027157850__b1460282592619">-j SNAT --to</strong> <em id="EN-US_TOPIC_0027157850__i5374194312551">nat-instance-ip</em></p>

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<ul id="EN-US_TOPIC_0030878383__ul1499818151265"><li id="EN-US_TOPIC_0030878383__li169988152261">Inbound: Inbound rules allow external network traffic to be sent to the <span id="EN-US_TOPIC_0030878383__text6334450160">ECS</span>s in the security group.</li><li id="EN-US_TOPIC_0030878383__li1399891572612">Outbound: Outbound rules allow network traffic from the <span id="EN-US_TOPIC_0030878383__text16112155519169">ECS</span>s in the security group to be sent out of the security group.</li></ul>
<p id="EN-US_TOPIC_0030878383__p91319310819">For details about the default security group rules, see <em id="EN-US_TOPIC_0030878383__i842352697143119">Virtual Private Cloud User Guide</em>. For details about configuration examples for security group rules, see <a href="en-us_topic_0140323152.html">Security Group Configuration Examples</a>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_section40712064223843"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_ol291224422402"><li id="EN-US_TOPIC_0030878383__li219527171617">Log in to the management console.</li><li id="EN-US_TOPIC_0030878383__li464234814566">Click <span><img id="EN-US_TOPIC_0030878383__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_li50026016224047">Under <strong id="EN-US_TOPIC_0030878383__b164019351531"><span id="EN-US_TOPIC_0030878383__text1740110358532">Computing</span></strong>, click <strong id="EN-US_TOPIC_0030878383__b74029356531">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0030878383__li34401539214315">On the <strong id="EN-US_TOPIC_0030878383__b9251123218404">Elastic Cloud Server</strong> page, click the name of the target <span id="EN-US_TOPIC_0030878383__text10144144802310">ECS</span>.<p id="EN-US_TOPIC_0030878383__p19982029214319">The <span id="EN-US_TOPIC_0030878383__text851815961111">ECS</span> details page is displayed.</p>
<div class="section" id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_section40712064223843"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_ol291224422402"><li id="EN-US_TOPIC_0030878383__li219527171617">Log in to the management console.</li><li id="EN-US_TOPIC_0030878383__li464234814566">Click <span><img id="EN-US_TOPIC_0030878383__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_li50026016224047">Under <strong id="EN-US_TOPIC_0030878383__b10765121019226"><span id="EN-US_TOPIC_0030878383__text177659107229">Computing</span></strong>, click <strong id="EN-US_TOPIC_0030878383__b77651910162212">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0030878383__li34401539214315">On the <strong id="EN-US_TOPIC_0030878383__b9251123218404">Elastic Cloud Server</strong> page, click the name of the target <span id="EN-US_TOPIC_0030878383__text10144144802310">ECS</span>.<p id="EN-US_TOPIC_0030878383__p19982029214319">The <span id="EN-US_TOPIC_0030878383__text851815961111">ECS</span> details page is displayed.</p>
</li><li id="EN-US_TOPIC_0030878383__li45534692214355">Click the <strong id="EN-US_TOPIC_0030878383__b8423527069595">Security Groups</strong> tab, expand the information of the security group, and view security group rules.</li><li id="EN-US_TOPIC_0030878383__li2997365821442">Click the security group ID.<p id="EN-US_TOPIC_0030878383__p5857465521443"><a name="EN-US_TOPIC_0030878383__li2997365821442"></a><a name="li2997365821442"></a>The system automatically switches to the security group details page.</p>
</li><li id="EN-US_TOPIC_0030878383__li17484122410232">On the <strong id="EN-US_TOPIC_0030878383__en-us_topic_0000001865662329_b2415741194114">Inbound Rules</strong> tab, click <strong id="EN-US_TOPIC_0030878383__en-us_topic_0000001865662329_b10415541124113">Add Rule</strong>.<p id="EN-US_TOPIC_0030878383__en-us_topic_0000001865662329_p1442168204914">The <strong id="EN-US_TOPIC_0030878383__en-us_topic_0000001865662329_b842352706101549">Add Inbound Rule</strong> dialog box is displayed.</p>
</li><li id="EN-US_TOPIC_0030878383__li795013166306">Configure required parameters.<p id="EN-US_TOPIC_0030878383__en-us_topic_0000001865662329_p10544530320"><a name="EN-US_TOPIC_0030878383__li795013166306"></a><a name="li795013166306"></a>You can click <strong id="EN-US_TOPIC_0030878383__b21273818145">+</strong> to add more inbound rules.</p>

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<h1 class="topictitle1">Detaching an EVS Disk from a Running ECS</h1>
<div id="body1471760962232"><div class="section" id="EN-US_TOPIC_0036046828__section15787511144344"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0036046828__p61233608144347">You can detach EVS disks from an ECS.</p>
<ul id="EN-US_TOPIC_0036046828__ul34783665144736"><li id="EN-US_TOPIC_0036046828__li2948622144736">System disks (mounted to <span class="filepath" id="EN-US_TOPIC_0036046828__filepath172571950016515"><b>/dev/sda</b></span> or <span class="filepath" id="EN-US_TOPIC_0036046828__filepath100298619716515"><b>/dev/vda</b></span>) can only be detached offline. They must be stopped before being detached.</li><li id="EN-US_TOPIC_0036046828__li571809915431">Data disks (mounted to points other than <strong id="EN-US_TOPIC_0036046828__b122526152146">/dev/sda</strong>) can be detached both online and offline if the attached ECS is running certain OSs. You can detach these data disks without stopping the ECS.</li></ul>
<ul id="EN-US_TOPIC_0036046828__ul34783665144736"><li id="EN-US_TOPIC_0036046828__li2948622144736">System disks (mounted to <span class="filepath" id="EN-US_TOPIC_0036046828__filepath172571950016515"><b>/dev/sda</b></span> or <span class="filepath" id="EN-US_TOPIC_0036046828__filepath100298619716515"><b>/dev/vda</b></span>) can only be detached offline. They must be stopped before being detached.</li><li id="EN-US_TOPIC_0036046828__li571809915431">Data disks (mounted to points other than <strong id="EN-US_TOPIC_0036046828__b11509941103616">/dev/sda</strong>) can be detached both online and offline if the attached ECS is running certain OSs. You can detach these data disks without stopping the ECS.</li></ul>
<p id="EN-US_TOPIC_0036046828__p5023067515435">This section describes how to detach a disk from a running <span id="EN-US_TOPIC_0036046828__text392914487276">ECS</span>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0036046828__section34475334143121"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0036046828__ul2123683814330"><li id="EN-US_TOPIC_0036046828__li61996412154820">The EVS disk to be detached must be mounted to a point other than <span class="filepath" id="EN-US_TOPIC_0036046828__filepath853326388165144"><b>/dev/sda</b></span> or <span class="filepath" id="EN-US_TOPIC_0036046828__filepath1079141565165144"><b>/dev/vda</b></span>.<p id="EN-US_TOPIC_0036046828__p12398226154820">EVS disks mounted to <span class="filepath" id="EN-US_TOPIC_0036046828__filepath108642609165156"><b>/dev/sda</b></span> or <span class="filepath" id="EN-US_TOPIC_0036046828__filepath904523234165156"><b>/dev/vda</b></span> are system disks and cannot be detached from running <span id="EN-US_TOPIC_0036046828__text4632449112720">ECS</span>s.</p>
</li><li id="EN-US_TOPIC_0036046828__li3988964315757">Before detaching an EVS disk from a running Windows <span id="EN-US_TOPIC_0036046828__text1127251818206">ECS</span>, make sure that OTC Tools have been installed on the <span id="EN-US_TOPIC_0036046828__text227310183209">ECS</span> and that the tools are running properly.</li><li id="EN-US_TOPIC_0036046828__li3824496314330">Before detaching an EVS disk from a running Windows <span id="EN-US_TOPIC_0036046828__text7825217272">ECS</span>, ensure that no programs are reading data from or writing data to the disk. Otherwise, data will be lost.</li><li id="EN-US_TOPIC_0036046828__li5498143194410">SCSI EVS disks cannot be detached from running Windows <span id="EN-US_TOPIC_0036046828__text1957985282711">ECS</span>s.</li></ul>
</li><li id="EN-US_TOPIC_0036046828__li3988964315757">Before detaching an EVS disk from a running Windows <span id="EN-US_TOPIC_0036046828__text1127251818206">ECS</span>, make sure that the OTC Tools has been installed and is running properly on the <span id="EN-US_TOPIC_0036046828__text845795110276">ECS</span>. For Linux <span id="EN-US_TOPIC_0036046828__text17893416184619">ECS</span>s, the OTC Tools is not required.</li><li id="EN-US_TOPIC_0036046828__li3824496314330">Before detaching an EVS disk from a running Windows <span id="EN-US_TOPIC_0036046828__text7825217272">ECS</span>, ensure that no programs are reading data from or writing data to the disk. Otherwise, data will be lost.</li><li id="EN-US_TOPIC_0036046828__li5498143194410">SCSI EVS disks cannot be detached from running Windows <span id="EN-US_TOPIC_0036046828__text1957985282711">ECS</span>s.</li></ul>
<ul id="EN-US_TOPIC_0036046828__ul1787075414330"><li id="EN-US_TOPIC_0036046828__li435515631715">Before detaching an EVS disk from a running Linux <span id="EN-US_TOPIC_0036046828__text161041853202718">ECS</span>, you must log in to the <span id="EN-US_TOPIC_0036046828__text1999316351317">ECS</span> and run the <strong id="EN-US_TOPIC_0036046828__b16542154283120">umount</strong> command to cancel the association between the disk and the file system. In addition, ensure that no programs are reading data from or writing data to the disk. Otherwise, detaching the disk will fail.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0036046828__section58087347152725"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0036046828__ul66280750153234"><li id="EN-US_TOPIC_0036046828__li1720245153234">On a Windows <span id="EN-US_TOPIC_0036046828__text18200754162714">ECS</span>, if the disk is in non-offline state, the system forcibly detaches the EVS disk. If this occurs, the system may generate a xenvbd alarm. You can ignore this alarm.<div class="note" id="EN-US_TOPIC_0036046828__note49048231101517"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0036046828__p38780895101517">To view the status of an EVS disk, perform the following operations:</p>
@ -127,7 +127,7 @@
<div class="note" id="EN-US_TOPIC_0036046828__note1774654154017"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0036046828__p15971893154017">Online detachment is not supported by the <span id="EN-US_TOPIC_0036046828__text152332586278">ECS</span>s running OSs not listed in the preceding table. For such <span id="EN-US_TOPIC_0036046828__text990141510461">ECS</span>s, stop the <span id="EN-US_TOPIC_0036046828__text17572171714460">ECS</span>s before detaching disks from them to prevent any possible problems from occurring.</p>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0036046828__section4606494215457"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0036046828__ol17420769173348"><li id="EN-US_TOPIC_0036046828__li41009011173348">On the <strong id="EN-US_TOPIC_0036046828__b64131524465">Elastic Cloud Server</strong> page, click the name of the <span id="EN-US_TOPIC_0036046828__text1691325918271">ECS</span> from which the EVS disk is to be detached. The <span id="EN-US_TOPIC_0036046828__text12537968476">ECS</span> details page is displayed.</li><li id="EN-US_TOPIC_0036046828__li20688073173348">Click the <strong id="EN-US_TOPIC_0036046828__b84235270692933">Disks</strong> tab. Locate the row containing the EVS disk to be detached and click <strong id="EN-US_TOPIC_0036046828__b842352706102711">Detach</strong>.</li></ol>
<div class="section" id="EN-US_TOPIC_0036046828__section4606494215457"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0036046828__ol17420769173348"><li id="EN-US_TOPIC_0036046828__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0036046828__li464234814566">Click <span><img id="EN-US_TOPIC_0036046828__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0036046828__li1514345963117">Under <strong id="EN-US_TOPIC_0036046828__b142123113511"><span id="EN-US_TOPIC_0036046828__text172122112512">Computing</span></strong>, click <strong id="EN-US_TOPIC_0036046828__b122127117511">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0036046828__li41009011173348">On the <strong id="EN-US_TOPIC_0036046828__b64131524465">Elastic Cloud Server</strong> page, click the name of the <span id="EN-US_TOPIC_0036046828__text1691325918271">ECS</span> from which the EVS disk is to be detached. The <span id="EN-US_TOPIC_0036046828__text12537968476">ECS</span> details page is displayed.</li><li id="EN-US_TOPIC_0036046828__li20688073173348">Click the <strong id="EN-US_TOPIC_0036046828__b84235270692933">Disks</strong> tab. Locate the row containing the EVS disk to be detached and click <strong id="EN-US_TOPIC_0036046828__b842352706102711">Detach</strong>.</li></ol>
</div>
</div>
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<h1 class="topictitle1">Large-Memory ECSs</h1>
<div id="body1474336784369"><div class="section" id="EN-US_TOPIC_0038024694__section25374905172644"><h4 class="sectiontitle">Overview</h4><p id="EN-US_TOPIC_0038024694__p29697875172646">Large-memory ECSs provide an even larger amount of memory than memory-optimized ECSs. They are used for applications that require a large amount of memory, rapid data exchange and processing, low latency, and capability of processing large volumes of data. Large-memory ECSs provide large memory and high computing, storage, and network performance.</p>
<ul id="EN-US_TOPIC_0038024694__ul4988641132914"><li id="EN-US_TOPIC_0038024694__li1198964122919">Features:<p id="EN-US_TOPIC_0038024694__p4989104110296"><a name="EN-US_TOPIC_0038024694__li1198964122919"></a><a name="li1198964122919"></a>The applications are for large-scale, enterprise-class, in-memory applications, process large volumes of data, and require rapid data switching, processing and low latency storage resource.</p>
</li><li id="EN-US_TOPIC_0038024694__li199896412293">Application scenarios<p id="EN-US_TOPIC_0038024694__p789411216236"><a name="EN-US_TOPIC_0038024694__li199896412293"></a><a name="li199896412293"></a>OLTP and OLAP scenarios</p>
<ul id="EN-US_TOPIC_0038024694__ul4988641132914"><li id="EN-US_TOPIC_0038024694__li1198964122919">Features<p id="EN-US_TOPIC_0038024694__p4989104110296"><a name="EN-US_TOPIC_0038024694__li1198964122919"></a><a name="li1198964122919"></a>The applications are for large-scale, enterprise-class, in-memory applications, process large volumes of data, and require rapid data switching, processing and low latency storage resource.</p>
</li><li id="EN-US_TOPIC_0038024694__li199896412293">Scenarios<p id="EN-US_TOPIC_0038024694__p789411216236"><a name="EN-US_TOPIC_0038024694__li199896412293"></a><a name="li199896412293"></a>OLTP and OLAP scenarios</p>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0038024694__section60740876172648"><h4 class="sectiontitle">Specifications</h4>

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</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0041169567__row122921831164313"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p16292631144317">2026-04-08</p>
<tbody><tr id="EN-US_TOPIC_0041169567__row9903114141915"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p6903184181917">2026-05-12</p>
</td>
<td class="cellrowborder" valign="top" width="81.03%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0041169567__p1645319510192">Modified the following content:</p>
<p id="EN-US_TOPIC_0041169567__p870915791918">Added X1m ECSs in <a href="en-us_topic_0035550301.html">Memory-optimized ECSs</a>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0041169567__row122921831164313"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p16292631144317">2026-04-08</p>
</td>
<td class="cellrowborder" valign="top" width="81.03%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0041169567__p1192211433432">Added the following content:</p>
<p id="EN-US_TOPIC_0041169567__p11922124317434"><a href="en-us_topic_0000001469584572.html">Configuring Secure Boot for an ECS</a></p>

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<div class="section" id="EN-US_TOPIC_0048642616__section2746706105950"><h4 class="sectiontitle">Impact on <span id="EN-US_TOPIC_0048642616__text1789415428342">ECS</span></h4><ul id="EN-US_TOPIC_0048642616__ul2000904310113"><li id="EN-US_TOPIC_0048642616__li4158057911579">When creating an <span id="EN-US_TOPIC_0048642616__text14978748191915">ECS</span>, if the selected image supports Cloud-Init or Cloudbase-Init, you can inject custom information (such as the <span id="EN-US_TOPIC_0048642616__text1978104811193">ECS</span> login password) during the initialization. For details, see <a href="en-us_topic_0032380449.html">Injecting User Data</a>.</li><li id="EN-US_TOPIC_0048642616__li4924709610430">After Cloud-Init is supported, ECSs do not support password authentication anymore. All newly created ECSs use key pair authentication. This change will affect your login to ECSs. For details, see the following sections:<ul id="EN-US_TOPIC_0048642616__ul19415265103937"><li id="EN-US_TOPIC_0048642616__li42939148103759"><a href="en-us_topic_0013771089.html">Login Overview (Linux)</a></li><li id="EN-US_TOPIC_0048642616__li24750406103813"><a href="en-us_topic_0037633087.html">What Is the Cloudbase-Init Account in Windows ECSs Used for?</a></li><li id="EN-US_TOPIC_0048642616__li61757858104056"><a href="en-us_topic_0031734664.html">Why Does the Login to My Linux ECS Using a Key File Fail?</a></li><li id="EN-US_TOPIC_0048642616__li12097450103839"><a href="en-us_topic_0031736846.html">Why Does the System Display a Message Indicating that the Password for Logging In to an ECS Cannot Be Obtained?</a></li></ul>
</li><li id="EN-US_TOPIC_0048642616__li25296237101910">After Cloud-Init or Cloudbase-Init is supported, you can view and use metadata to configure and manage running <span id="EN-US_TOPIC_0048642616__text33634376424">ECS</span>s. For details, see <a href="en-us_topic_0042400609.html">Obtaining ECS Details Using Metadata</a>.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0048642616__section4202207210118"><h4 class="sectiontitle">Impact on AS</h4><ul id="EN-US_TOPIC_0048642616__ul11675179111444"><li id="EN-US_TOPIC_0048642616__li17822332111444">When creating an AS configuration, you can use the <strong id="EN-US_TOPIC_0048642616__b7901175110233">User Data</strong> function to specify <span id="EN-US_TOPIC_0048642616__text2732946174214">ECS</span> configurations for initialization. If the AS configuration has taken effect in an AS group, the <span id="EN-US_TOPIC_0048642616__text11779154943119">ECS</span>s newly created in the AS group will automatically initialize their configurations based on the specified <span id="EN-US_TOPIC_0048642616__text5281103441117">ECS</span> configurations.</li><li id="EN-US_TOPIC_0048642616__li27735704111447">For an existing AS configuration, if its private image does not have Cloud-Init or Cloudbase-Init installed, the login mode of the <span id="EN-US_TOPIC_0048642616__text498535803212">ECS</span>s created in the AS group where the AS configuration takes effect may fail to take effect.<p id="EN-US_TOPIC_0048642616__p1760013719529">To resolve this issue, see "How Does Cloud-Init Affect the AS Service?" in <em id="EN-US_TOPIC_0048642616__i1000928909">Auto Scaling User Guide</em>.</p>
<div class="section" id="EN-US_TOPIC_0048642616__section4202207210118"><h4 class="sectiontitle">Impact on AS</h4><ul id="EN-US_TOPIC_0048642616__ul11675179111444"><li id="EN-US_TOPIC_0048642616__li17822332111444">When creating an AS configuration, you can use the <strong id="EN-US_TOPIC_0048642616__b7901175110233">User Data</strong> function to specify <span id="EN-US_TOPIC_0048642616__text2732946174214">ECS</span> configurations for initialization. If the AS configuration has taken effect in an AS group, the <span id="EN-US_TOPIC_0048642616__text11779154943119">ECS</span>s newly created in the AS group will automatically initialize their configurations based on the specified <span id="EN-US_TOPIC_0048642616__text5281103441117">ECS</span> configurations.</li><li id="EN-US_TOPIC_0048642616__li27735704111447">For an existing AS configuration, if its private image does not have Cloud-Init or Cloudbase-Init installed, the login mode of the <span id="EN-US_TOPIC_0048642616__text498535803212">ECS</span>s created in the AS group where the AS configuration takes effect may fail to take effect.<p id="EN-US_TOPIC_0048642616__p1760013719529">To resolve this issue, see "How Does Cloud-Init Affect the AS Service?" in <em id="EN-US_TOPIC_0048642616__i1684050997">Auto Scaling User Guide</em>.</p>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0048642616__section44995720162019"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0048642616__ul27309930162147"><li id="EN-US_TOPIC_0048642616__li57792420162147">When using Cloud-Init, enable DHCP in the VPC which the <span id="EN-US_TOPIC_0048642616__text1781819502422">ECS</span> belongs to.</li><li id="EN-US_TOPIC_0048642616__li3134774162149">When using Cloud-Init, ensure that security group rules for the outbound direction meet the following requirements:<ul id="EN-US_TOPIC_0048642616__ul58881557162226"><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li4991456153157">Protocol: TCP</li><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li5391447153614">Port: 80</li><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li57518749153625">Destination: 169.254.0.0/16</li></ul>
<div class="section" id="EN-US_TOPIC_0048642616__section44995720162019"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0048642616__ul27309930162147"><li id="EN-US_TOPIC_0048642616__li57792420162147">When using Cloud-Init, enable DHCP for the VPC subnet that the <span id="EN-US_TOPIC_0048642616__text1781819502422">ECS</span> belongs to.</li><li id="EN-US_TOPIC_0048642616__li3134774162149">When using Cloud-Init, ensure that security group rules for the outbound direction meet the following requirements:<ul id="EN-US_TOPIC_0048642616__ul58881557162226"><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li4991456153157">Protocol: TCP</li><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li5391447153614">Port: 80</li><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li57518749153625">Destination: 169.254.0.0/16</li></ul>
<div class="note" id="EN-US_TOPIC_0048642616__note40094412162251"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_p6641537815423">If you use the default security group rules for the outbound direction, the metadata can be accessed because the default rules meet the preceding requirements. For details about the default security group rules for the outbound direction, see <a href="en-us_topic_0030828257.html#EN-US_TOPIC_0030828257__section15617142420109">Security Group</a>.</p>
</div></div>
</li></ul>

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</table>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0058758453__section1659682611504"><a name="EN-US_TOPIC_0058758453__section1659682611504"></a><a name="section1659682611504"></a><h4 class="sectiontitle">Importing the External Image File to the IMS Console</h4><p id="EN-US_TOPIC_0058758453__p17965328192814">For details, see "Registering an Image File as a Private Image" in <em id="EN-US_TOPIC_0058758453__i1014236280">Image Management Service User Guide</em>.</p>
<div class="section" id="EN-US_TOPIC_0058758453__section1659682611504"><a name="EN-US_TOPIC_0058758453__section1659682611504"></a><a name="section1659682611504"></a><h4 class="sectiontitle">Importing the External Image File to the IMS Console</h4><p id="EN-US_TOPIC_0058758453__p17965328192814">For details, see "Registering an Image File as a Private Image" in <em id="EN-US_TOPIC_0058758453__i61883537">Image Management Service User Guide</em>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0058758453__section1949113217282"><a name="EN-US_TOPIC_0058758453__section1949113217282"></a><a name="section1949113217282"></a><h4 class="sectiontitle">Setting NIC Multi-Queue for the Image</h4><p id="EN-US_TOPIC_0058758453__p58271414183619">Windows OSs have not commercially supported NIC multi-queue. If you enable NIC multi-queue in a Windows image, starting an ECS created using such an image may be slow.</p>
<p id="EN-US_TOPIC_0058758453__en-us_topic_0029124501_p50557625103330">Use one of the following methods to set the NIC multi-queue attribute:</p>
<div class="p" id="EN-US_TOPIC_0058758453__p1221514712570"><strong id="EN-US_TOPIC_0058758453__b154571917185510">Method 1:</strong><ol id="EN-US_TOPIC_0058758453__ol174625171552"><li id="EN-US_TOPIC_0058758453__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_li11022506103357">Under <strong id="EN-US_TOPIC_0058758453__b5120165054319"><span id="EN-US_TOPIC_0058758453__text1712019502439">Computing</span></strong>, click <strong id="EN-US_TOPIC_0058758453__b11120350114317">Image Management Service</strong>.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_li20407780103357">Click the <strong id="EN-US_TOPIC_0058758453__b173271529104811">Private Images</strong> tab, locate the row containing the target image, click <strong id="EN-US_TOPIC_0058758453__b1167751384911">Modify</strong> in the <strong id="EN-US_TOPIC_0058758453__b15949168114916">Operation</strong> column.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_li378927794156">Set the NIC multi-queue attribute of the image.</li></ol>
<div class="p" id="EN-US_TOPIC_0058758453__p1221514712570"><strong id="EN-US_TOPIC_0058758453__b154571917185510">Method 1:</strong><ol id="EN-US_TOPIC_0058758453__ol174625171552"><li id="EN-US_TOPIC_0058758453__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_li11022506103357">Under <strong id="EN-US_TOPIC_0058758453__b1527242703811"><span id="EN-US_TOPIC_0058758453__text9272827123817">Computing</span></strong>, click <strong id="EN-US_TOPIC_0058758453__b172721227113813">Image Management Service</strong>.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_li20407780103357">Click the <strong id="EN-US_TOPIC_0058758453__b173271529104811">Private Images</strong> tab, locate the row containing the target image, click <strong id="EN-US_TOPIC_0058758453__b1167751384911">Modify</strong> in the <strong id="EN-US_TOPIC_0058758453__b15949168114916">Operation</strong> column.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_li378927794156">Set the NIC multi-queue attribute of the image.</li></ol>
</div>
<div class="p" id="EN-US_TOPIC_0058758453__p922216711571"><strong id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_b13742552103330">Method 2:</strong><ol id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_ol16137803103357"><li id="EN-US_TOPIC_0058758453__li316415511718">Log in to the management console.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_li1172310710368">Under <strong id="EN-US_TOPIC_0058758453__b189613323438"><span id="EN-US_TOPIC_0058758453__text1789633219438">Computing</span></strong>, click <strong id="EN-US_TOPIC_0058758453__b3896332194320">Image Management Service</strong>.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_li1004764310368">Click the <strong id="EN-US_TOPIC_0058758453__b198686015502">Private Images</strong> tab. In the image list, click the name of the target image to go to the image details page.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_li23556791144955">Click <strong id="EN-US_TOPIC_0058758453__b1922010615219">Modify</strong> in the upper right corner. In the displayed <strong id="EN-US_TOPIC_0058758453__b1622313612211">Modify Image</strong> dialog box, set the NIC multi-queue attribute.</li></ol>
<div class="p" id="EN-US_TOPIC_0058758453__p922216711571"><strong id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_b13742552103330">Method 2:</strong><ol id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_ol16137803103357"><li id="EN-US_TOPIC_0058758453__li316415511718">Log in to the management console.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_li1172310710368">Under <strong id="EN-US_TOPIC_0058758453__b584364319387"><span id="EN-US_TOPIC_0058758453__text1384310436381">Computing</span></strong>, click <strong id="EN-US_TOPIC_0058758453__b1884324323810">Image Management Service</strong>.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_en-us_topic_0029124501_li1004764310368">Click the <strong id="EN-US_TOPIC_0058758453__b198686015502">Private Images</strong> tab. In the image list, click the name of the target image to go to the image details page.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_li23556791144955">Click <strong id="EN-US_TOPIC_0058758453__b1922010615219">Modify</strong> in the upper right corner. In the displayed <strong id="EN-US_TOPIC_0058758453__b1622313612211">Modify Image</strong> dialog box, set the NIC multi-queue attribute.</li></ol>
</div>
<p id="EN-US_TOPIC_0058758453__p83661859131217"><strong id="EN-US_TOPIC_0058758453__b84235270614342">Method 3:</strong> Add <strong id="EN-US_TOPIC_0058758453__b842352706143543">hw_vif_multiqueue_enabled</strong> to an image through the API.</p>
<ol id="EN-US_TOPIC_0058758453__ol35807599162643"><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_li13762086162643"><a name="EN-US_TOPIC_0058758453__en-us_topic_0085214115_li13762086162643"></a><a name="en-us_topic_0085214115_li13762086162643"></a>For instructions about how to obtain the token, see <a href="https://docs.otc.t-systems.com/en-us/api/apiug/apig-en-api-180328003.html" target="_blank" rel="noopener noreferrer">Token Authentication</a>.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_li13555124724017">For instructions about how to call an API to update image information, see "Updating Image Information (Native OpenStack API)" in <em id="EN-US_TOPIC_0058758453__i9923112314212">Image Management Service API Reference</em>.</li><li id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_li63700435163736">Add <strong id="EN-US_TOPIC_0058758453__b842352706145152">X-Auth-Token</strong> to the request header.<p id="EN-US_TOPIC_0058758453__en-us_topic_0085214115_p29351077163738">The value of <strong id="EN-US_TOPIC_0058758453__b2007658833145216">X-Auth-Token</strong> is the token obtained in step <a href="#EN-US_TOPIC_0058758453__en-us_topic_0085214115_li13762086162643">1</a>.</p>
@ -172,7 +172,7 @@
</li></ol>
<p id="EN-US_TOPIC_0058758453__p1971624101317"></p>
</div>
<div class="section" id="EN-US_TOPIC_0058758453__section1841681225617"><a name="EN-US_TOPIC_0058758453__section1841681225617"></a><a name="section1841681225617"></a><h4 class="sectiontitle">Creating an <span id="EN-US_TOPIC_0058758453__text316151522317">ECS</span> Using a Private Image</h4><div class="p" id="EN-US_TOPIC_0058758453__p1518372618317">You can create an <span id="EN-US_TOPIC_0058758453__text16924131182113">ECS</span> using a registered private image. For details, see <a href="en-us_topic_0021831611.html">Creating an ECS</a>. Note the following when setting the parameters:<ul id="EN-US_TOPIC_0058758453__ul107151117143111"><li id="EN-US_TOPIC_0058758453__li8715181711317"><strong id="EN-US_TOPIC_0058758453__b1261035107">Region</strong>: Select the region where the private image is located.</li><li id="EN-US_TOPIC_0058758453__li12715717193114"><strong id="EN-US_TOPIC_0058758453__b0297112994615">Image</strong>: Click <strong id="EN-US_TOPIC_0058758453__b329712913465">Private image</strong> and then select the desired image from the drop-down list.</li></ul>
<div class="section" id="EN-US_TOPIC_0058758453__section1841681225617"><a name="EN-US_TOPIC_0058758453__section1841681225617"></a><a name="section1841681225617"></a><h4 class="sectiontitle">Creating an <span id="EN-US_TOPIC_0058758453__text316151522317">ECS</span> Using a Private Image</h4><div class="p" id="EN-US_TOPIC_0058758453__p1518372618317">You can create an <span id="EN-US_TOPIC_0058758453__text16924131182113">ECS</span> using a registered private image. For details, see <a href="en-us_topic_0021831611.html">Creating an ECS</a>. Note the following when setting the parameters:<ul id="EN-US_TOPIC_0058758453__ul107151117143111"><li id="EN-US_TOPIC_0058758453__li8715181711317"><strong id="EN-US_TOPIC_0058758453__b1756555845">Region</strong>: Select the region where the private image is located.</li><li id="EN-US_TOPIC_0058758453__li12715717193114"><strong id="EN-US_TOPIC_0058758453__b0297112994615">Image</strong>: Click <strong id="EN-US_TOPIC_0058758453__b329712913465">Private image</strong> and then select the desired image from the drop-down list.</li></ul>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0058758453__section214227201118"><a name="EN-US_TOPIC_0058758453__section214227201118"></a><a name="section214227201118"></a><h4 class="sectiontitle">Enabling NIC Multi-Queue</h4><p id="EN-US_TOPIC_0058758453__p9725123784">KVM Windows <span id="EN-US_TOPIC_0058758453__text16625933172318">ECS</span>s use private images to support NIC multi-queue. For details, see "How Do I Set NIC Multi-queue Feature of an Image?" in <em id="EN-US_TOPIC_0058758453__i84235269717829">Image Management Service User Guide</em>.</p>

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</div>
<div class="section" id="EN-US_TOPIC_0093492517__section5243818103912"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0093492517__ul298053012418"><li id="EN-US_TOPIC_0093492517__li59801830134118">Changing the security group will overwrite the original security group settings.</li><li id="EN-US_TOPIC_0093492517__li176711684210">Using multiple security groups may deteriorate <span id="EN-US_TOPIC_0093492517__text9329193614394">ECS</span> network performance. You are advised to select no more than five security groups.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0093492517__section148110439474"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492517__ol146871568377"><li id="EN-US_TOPIC_0093492517__li7326164551918">Log in to the management console and access the <span id="EN-US_TOPIC_0093492517__en-us_topic_0000001825604541_ph757171041418">ECS</span> list page.</li><li id="EN-US_TOPIC_0093492517__li1168746173718">Click <span><img id="EN-US_TOPIC_0093492517__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492517__li206871564372">Under <strong id="EN-US_TOPIC_0093492517__b319313811516"><span id="EN-US_TOPIC_0093492517__text019373861514">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492517__b4193143810159">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492517__li6688267371">In the ECS list, choose <strong id="EN-US_TOPIC_0093492517__b1747184618712">More</strong> &gt; <strong id="EN-US_TOPIC_0093492517__b347112464713">Manage Network</strong> &gt; <strong id="EN-US_TOPIC_0093492517__b16471184618712">Change Security Group</strong> in the <strong id="EN-US_TOPIC_0093492517__b147117466713">Operation</strong> column.<p id="EN-US_TOPIC_0093492517__p968836143718">The <strong id="EN-US_TOPIC_0093492517__b842352706162949">Change Security Group</strong> panel slides out.</p>
<div class="section" id="EN-US_TOPIC_0093492517__section148110439474"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492517__ol146871568377"><li id="EN-US_TOPIC_0093492517__li143302474231">Log in to the management console.</li><li id="EN-US_TOPIC_0093492517__li1168746173718">Click <span><img id="EN-US_TOPIC_0093492517__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492517__li206871564372">Under <strong id="EN-US_TOPIC_0093492517__b117831118152213"><span id="EN-US_TOPIC_0093492517__text878301882214">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492517__b578321814222">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492517__li6688267371">In the ECS list, choose <strong id="EN-US_TOPIC_0093492517__b1747184618712">More</strong> &gt; <strong id="EN-US_TOPIC_0093492517__b347112464713">Manage Network</strong> &gt; <strong id="EN-US_TOPIC_0093492517__b16471184618712">Change Security Group</strong> in the <strong id="EN-US_TOPIC_0093492517__b147117466713">Operation</strong> column.<p id="EN-US_TOPIC_0093492517__p968836143718">The <strong id="EN-US_TOPIC_0093492517__b842352706162949">Change Security Group</strong> panel slides out.</p>
<div class="fignone" id="EN-US_TOPIC_0093492517__fig1673733486"><span class="figcap"><b>Figure 1 </b>Change Security Group</span><br><span><img id="EN-US_TOPIC_0093492517__image1329222510" src="en-us_image_0000002385344877.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0093492517__li14114175682518">Select the target NIC and security groups.<p id="EN-US_TOPIC_0093492517__p1615510191262"><a name="EN-US_TOPIC_0093492517__li14114175682518"></a><a name="li14114175682518"></a>You can select multiple security groups. In such a case, the rules of all the selected security groups will apply to the <span id="EN-US_TOPIC_0093492517__text10680201271119">ECS</span>.</p>
<p id="EN-US_TOPIC_0093492517__p1669712426182">To create a security group, click <strong id="EN-US_TOPIC_0093492517__b1291994117114">Create Security Group</strong>.</p>

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<h1 class="topictitle1">Attaching a Network Interface</h1>
<div id="body1516164960187"><div class="section" id="EN-US_TOPIC_0093492518__section56491713122912"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0093492518__p137925188372">If your <span id="EN-US_TOPIC_0093492518__text744811287229">ECS</span> requires multiple network interfaces, you can attach them to your <span id="EN-US_TOPIC_0093492518__text71851629112214">ECS</span>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0093492518__section737852572918"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492518__ol187946183379"><li id="EN-US_TOPIC_0093492518__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0093492518__li464234814566">Click <span><img id="EN-US_TOPIC_0093492518__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492518__li079521816378">Under <strong id="EN-US_TOPIC_0093492518__b1647693317811"><span id="EN-US_TOPIC_0093492518__text1547614331181">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492518__b5477433581">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492518__li4796171815377">Click the name of the <span id="EN-US_TOPIC_0093492518__text198063114223">ECS</span> to which you want to attach a network interface.<p id="EN-US_TOPIC_0093492518__p1979631813379">The <span id="EN-US_TOPIC_0093492518__text6699161211106">ECS</span> details page is displayed.</p>
<div class="section" id="EN-US_TOPIC_0093492518__section737852572918"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492518__ol187946183379"><li id="EN-US_TOPIC_0093492518__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0093492518__li464234814566">Click <span><img id="EN-US_TOPIC_0093492518__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492518__li079521816378">Under <strong id="EN-US_TOPIC_0093492518__b1729519104410"><span id="EN-US_TOPIC_0093492518__text772910198448">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492518__b572921915449">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492518__li4796171815377">Click the name of the <span id="EN-US_TOPIC_0093492518__text198063114223">ECS</span> to which you want to attach a network interface.<p id="EN-US_TOPIC_0093492518__p1979631813379">The <span id="EN-US_TOPIC_0093492518__text6699161211106">ECS</span> details page is displayed.</p>
</li><li id="EN-US_TOPIC_0093492518__li147961818103717">On the <strong id="EN-US_TOPIC_0093492518__b13482135514168">Network Interfaces</strong> tab, click <strong id="EN-US_TOPIC_0093492518__b730621991715">Attach Network Interface</strong>.</li><li id="EN-US_TOPIC_0093492518__li10645185715258">Select either of the following methods to attach the network interface.<ul id="EN-US_TOPIC_0093492518__ul81651734152817"><li id="EN-US_TOPIC_0093492518__li199481119133316">Use an existing network interface.<ol type="a" id="EN-US_TOPIC_0093492518__ol0330122713312"><li id="EN-US_TOPIC_0093492518__li15433173311344">(Optional) Search for the network interface by name, ID, or private IP address.</li><li id="EN-US_TOPIC_0093492518__li9330122793311">In the network interface list, select the target one.</li></ol>
</li><li id="EN-US_TOPIC_0093492518__li152351845102818">Create a new network interface.<p id="EN-US_TOPIC_0093492518__p1956274814509"><a name="EN-US_TOPIC_0093492518__li152351845102818"></a><a name="li152351845102818"></a>Set the subnet and security group for the network interface to be attached.</p>
<div class="fignone" id="EN-US_TOPIC_0093492518__fig95275135171"><span class="figcap"><b>Figure 1 </b>Configuring the subnet and security group</span><br><span><img id="EN-US_TOPIC_0093492518__image99541497171" src="en-us_image_0000002351500708.png" title="Click to enlarge" class="imgResize"></span></div>
@ -12,7 +12,7 @@
</li><li id="EN-US_TOPIC_0093492518__li2080091816377">Click <strong id="EN-US_TOPIC_0093492518__b842352706165945">OK</strong>.</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0093492518__section10882163016340"><h4 class="sectiontitle">Follow-up Procedure</h4><p id="EN-US_TOPIC_0093492518__p58011418123717">Some OSs cannot identify newly attached network interfaces. In this case, you need to manually activate the network interfaces. The following uses Ubuntu as an example to show how to activate network interfaces. Operations may vary depending on the operating system. You can refer to the corresponding OS documentation for assistance.</p>
<ol id="EN-US_TOPIC_0093492518__ol294910985212"><li id="EN-US_TOPIC_0093492518__li2949109175218">Locate the row containing the target <span id="EN-US_TOPIC_0093492518__text5179194961112">ECS</span> and click <strong id="EN-US_TOPIC_0093492518__b1618414921114">Remote Login</strong> in the <strong id="EN-US_TOPIC_0093492518__b20184204921117">Operation</strong> column.<p id="EN-US_TOPIC_0093492518__p895016975220">Log in to the <span id="EN-US_TOPIC_0093492518__text13837141531213">ECS</span>.</p>
<ol id="EN-US_TOPIC_0093492518__ol294910985212"><li id="EN-US_TOPIC_0093492518__li1660416195112">Log in to the management console.</li><li id="EN-US_TOPIC_0093492518__li146041191915">Click <span><img id="EN-US_TOPIC_0093492518__en-us_topic_0000001825604541_image9499446838_1" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492518__li156041819112">Under <strong id="EN-US_TOPIC_0093492518__b12133172194417"><span id="EN-US_TOPIC_0093492518__text01331421194419">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492518__b1013419217447">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492518__li2949109175218">Locate the row containing the target <span id="EN-US_TOPIC_0093492518__text5179194961112">ECS</span> and click <strong id="EN-US_TOPIC_0093492518__b1618414921114">Remote Login</strong> in the <strong id="EN-US_TOPIC_0093492518__b20184204921117">Operation</strong> column.<p id="EN-US_TOPIC_0093492518__p895016975220">Log in to the <span id="EN-US_TOPIC_0093492518__text13837141531213">ECS</span>.</p>
</li><li id="EN-US_TOPIC_0093492518__li595089165210"><a name="EN-US_TOPIC_0093492518__li595089165210"></a><a name="li595089165210"></a>Run the following command to view the network interface name:<p id="EN-US_TOPIC_0093492518__p29507910525"><a name="EN-US_TOPIC_0093492518__li595089165210"></a><a name="li595089165210"></a><strong id="EN-US_TOPIC_0093492518__b1895019135217">ifconfig -a</strong></p>
<p id="EN-US_TOPIC_0093492518__p595049165214">In this example, the network interface name is <strong id="EN-US_TOPIC_0093492518__b74038287116">eth2</strong>.</p>
</li><li id="EN-US_TOPIC_0093492518__li16950129115211">Run the following command to switch to the target directory:<p id="EN-US_TOPIC_0093492518__p79505914522"><a name="EN-US_TOPIC_0093492518__li16950129115211"></a><a name="li16950129115211"></a><strong id="EN-US_TOPIC_0093492518__b11950109135219">cd /etc/network</strong></p>
@ -21,10 +21,10 @@
<p id="EN-US_TOPIC_0093492518__p79512915217"><strong id="EN-US_TOPIC_0093492518__b431581062151056">iface</strong> <em id="EN-US_TOPIC_0093492518__i1414543114151056">eth2</em> <strong id="EN-US_TOPIC_0093492518__b420694667151056">inet dhcp</strong></p>
</li><li id="EN-US_TOPIC_0093492518__li695217913525">Run the following command to save and exit the <strong id="EN-US_TOPIC_0093492518__b6556586233">interfaces</strong> file:<p id="EN-US_TOPIC_0093492518__p8952119125210"><strong id="EN-US_TOPIC_0093492518__b1795214985217">:wq</strong></p>
</li><li id="EN-US_TOPIC_0093492518__li119522099529">Run either the <strong id="EN-US_TOPIC_0093492518__b1661014506114">ifup eth</strong><em id="EN-US_TOPIC_0093492518__i1561135010117"><strong id="EN-US_TOPIC_0093492518__b361025015114">X</strong></em> command or the <strong id="EN-US_TOPIC_0093492518__b1861217501811">/etc/init.d/networking restart</strong> command to make the newly added network interface take effect.<p id="EN-US_TOPIC_0093492518__p99528919528"><em id="EN-US_TOPIC_0093492518__i842352697155956">X</em> in the preceding command indicates the serial number of the network interface, for example, <strong id="EN-US_TOPIC_0093492518__b124938701017837">ifup eth2</strong>.</p>
</li><li id="EN-US_TOPIC_0093492518__li99534916522">Run the following command to check whether the network interface name obtained in step <a href="#EN-US_TOPIC_0093492518__li595089165210">2</a> is displayed in the command output:<p id="EN-US_TOPIC_0093492518__p1795314917527"><strong id="EN-US_TOPIC_0093492518__b179534910525">ifconfig</strong></p>
</li><li id="EN-US_TOPIC_0093492518__li99534916522">Run the following command to check whether the network interface name obtained in step <a href="#EN-US_TOPIC_0093492518__li595089165210">5</a> is displayed in the command output:<p id="EN-US_TOPIC_0093492518__p1795314917527"><strong id="EN-US_TOPIC_0093492518__b179534910525">ifconfig</strong></p>
<p id="EN-US_TOPIC_0093492518__p189531393529">For example, check whether <strong id="EN-US_TOPIC_0093492518__b082154212104">eth2</strong> is displayed in the command output.</p>
<ul id="EN-US_TOPIC_0093492518__ul1395313913522"><li id="EN-US_TOPIC_0093492518__li59531915213">If yes, the newly added network interface has been activated. No further action is required.</li><li id="EN-US_TOPIC_0093492518__li995449145216">If no, the newly added network interface failed to be activated. Go to step <a href="#EN-US_TOPIC_0093492518__li1695469165210">9</a>.</li></ul>
</li><li id="EN-US_TOPIC_0093492518__li1695469165210"><a name="EN-US_TOPIC_0093492518__li1695469165210"></a><a name="li1695469165210"></a>Log in to the management console. On the ECS list page, locate the row that contains the target <span id="EN-US_TOPIC_0093492518__text13225163662219">ECS</span> and choose <strong id="EN-US_TOPIC_0093492518__b1530710341139">More</strong> &gt; <strong id="EN-US_TOPIC_0093492518__b1380019432315">Restart</strong> in the <strong id="EN-US_TOPIC_0093492518__b14694489312">Operation</strong> column.</li><li id="EN-US_TOPIC_0093492518__li1954199175219">Run <strong id="EN-US_TOPIC_0093492518__b1559266161117">ifconfig</strong> again to check whether the network interface name obtained in step <a href="#EN-US_TOPIC_0093492518__li595089165210">2</a> is displayed in the command output.<ul id="EN-US_TOPIC_0093492518__ul1695559125214"><li id="EN-US_TOPIC_0093492518__li795514975220">If yes, no further action is required.</li><li id="EN-US_TOPIC_0093492518__li79551191526">If no, contact customer service.</li></ul>
<ul id="EN-US_TOPIC_0093492518__ul1395313913522"><li id="EN-US_TOPIC_0093492518__li59531915213">If yes, the newly added network interface has been activated. No further action is required.</li><li id="EN-US_TOPIC_0093492518__li995449145216">If no, the newly added network interface failed to be activated. Go to step <a href="#EN-US_TOPIC_0093492518__li1695469165210">12</a>.</li></ul>
</li><li id="EN-US_TOPIC_0093492518__li1695469165210"><a name="EN-US_TOPIC_0093492518__li1695469165210"></a><a name="li1695469165210"></a>Log in to the management console. On the ECS list page, locate the row that contains the target <span id="EN-US_TOPIC_0093492518__text13225163662219">ECS</span> and choose <strong id="EN-US_TOPIC_0093492518__b1530710341139">More</strong> &gt; <strong id="EN-US_TOPIC_0093492518__b1380019432315">Restart</strong> in the <strong id="EN-US_TOPIC_0093492518__b14694489312">Operation</strong> column.</li><li id="EN-US_TOPIC_0093492518__li1954199175219">Run <strong id="EN-US_TOPIC_0093492518__b1559266161117">ifconfig</strong> again to check whether the network interface name obtained in step <a href="#EN-US_TOPIC_0093492518__li595089165210">5</a> is displayed in the command output.<ul id="EN-US_TOPIC_0093492518__ul1695559125214"><li id="EN-US_TOPIC_0093492518__li795514975220">If yes, no further action is required.</li><li id="EN-US_TOPIC_0093492518__li79551191526">If no, contact customer service.</li></ul>
</li></ol>
</div>
</div>

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<div class="caution" id="EN-US_TOPIC_0093492519__note716974122718"><span class="cautiontitle"><img src="public_sys-resources/caution_3.0-en-us.png"> </span><div class="cautionbody"><p id="EN-US_TOPIC_0093492519__p11876356191413">Detaching a network interface may cause network interruptions. Evaluate the impact in advance and exercise caution when performing this operation.</p>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0093492519__section226511133385"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492519__ol31701035143714"><li id="EN-US_TOPIC_0093492519__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0093492519__li1317015353373">Click <span><img id="EN-US_TOPIC_0093492519__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492519__li15170113514377">Under <strong id="EN-US_TOPIC_0093492519__b41671021141011"><span id="EN-US_TOPIC_0093492519__text1516715212103">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492519__b716716218105">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492519__li1717083519375">In the <span id="EN-US_TOPIC_0093492519__text028253915220">ECS</span> list, click the name of the ECS from which you want to detach a network interface<p id="EN-US_TOPIC_0093492519__p1171123514378">The <span id="EN-US_TOPIC_0093492519__text15420162316108">ECS</span> details page is displayed.</p>
<div class="section" id="EN-US_TOPIC_0093492519__section226511133385"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492519__ol31701035143714"><li id="EN-US_TOPIC_0093492519__li91651831217">Log in to the management console.</li><li id="EN-US_TOPIC_0093492519__li464234814566">Click <span><img id="EN-US_TOPIC_0093492519__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492519__li079521816378">Under <strong id="EN-US_TOPIC_0093492519__b1493926144413"><span id="EN-US_TOPIC_0093492519__text893122684419">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492519__b1893026154416">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492519__li1717083519375">In the <span id="EN-US_TOPIC_0093492519__text028253915220">ECS</span> list, click the name of the ECS from which you want to detach a network interface<p id="EN-US_TOPIC_0093492519__p1171123514378">The <span id="EN-US_TOPIC_0093492519__text15420162316108">ECS</span> details page is displayed.</p>
</li><li id="EN-US_TOPIC_0093492519__li20801423835">On the <strong id="EN-US_TOPIC_0093492519__b65631224154310">Network Interfaces</strong> tab, locate the target network interface and click <strong id="EN-US_TOPIC_0093492519__b1655814573433">Detach</strong>.<div class="note" id="EN-US_TOPIC_0093492519__note1354402520414"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0093492519__p2544182512414">You are not allowed to detach the primary network interface (the first one displayed in the network interface list).</p>
</div></div>
</li><li id="EN-US_TOPIC_0093492519__li71724353372">In the displayed dialog box, click <strong id="EN-US_TOPIC_0093492519__b2231348161117">OK</strong>.<div class="note" id="EN-US_TOPIC_0093492519__note5172635103714"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0093492519__p517312356376">Certain ECSs do not support network interface detachment when they are running. For details, see the GUI display. To detach a network interface from such an ECS, stop the ECS first.</p>

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@ -130,7 +130,7 @@ eth0: flags=4163&lt;UP,BROADCAST,RUNNING,MULTICAST&gt; mtu 1500
<div class="section" id="EN-US_TOPIC_0093492520__section040919146466"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0093492520__p13453552673">A virtual IP address provides the second IP address for one or more <span id="EN-US_TOPIC_0093492520__text573185512214">ECS</span> NICs, improving high availability between the <span id="EN-US_TOPIC_0093492520__text189506409188">ECS</span>s.</p>
<p id="EN-US_TOPIC_0093492520__p5454145216718">One NIC can be bound with up to 10 virtual IP addresses, and one virtual IP address can be bound to up to 10 NICs. Multiple <span id="EN-US_TOPIC_0093492520__text20123154771817">ECS</span>s deployed to work in active/standby mode can be bound with the same virtual IP address for disaster recovery.</p>
</div>
<div class="section" id="EN-US_TOPIC_0093492520__section194113342460"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492520__ol745410521478"><li id="EN-US_TOPIC_0093492520__li113011445171617">Log in to the management console.</li><li id="EN-US_TOPIC_0093492520__li34551352570">Click <span><img id="EN-US_TOPIC_0093492520__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492520__li174557521713">Under <strong id="EN-US_TOPIC_0093492520__b15391430123917"><span id="EN-US_TOPIC_0093492520__text17533630203914">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492520__b65403306393">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492520__li174550521710">On the <strong id="EN-US_TOPIC_0093492520__b13711135712182">Elastic Cloud Server</strong> page, click the name of the target <span id="EN-US_TOPIC_0093492520__text1711145712185">ECS</span>.<p id="EN-US_TOPIC_0093492520__p945519526717">The <span id="EN-US_TOPIC_0093492520__text16115153221015">ECS</span> details page is displayed.</p>
<div class="section" id="EN-US_TOPIC_0093492520__section194113342460"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492520__ol745410521478"><li id="EN-US_TOPIC_0093492520__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0093492520__li1041312241312">Click <span><img id="EN-US_TOPIC_0093492520__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492520__li841462415312">Under <strong id="EN-US_TOPIC_0093492520__b82911306171"><span id="EN-US_TOPIC_0093492520__text229173091710">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492520__b193093041716">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492520__li174550521710">On the <strong id="EN-US_TOPIC_0093492520__b13711135712182">Elastic Cloud Server</strong> page, click the name of the target <span id="EN-US_TOPIC_0093492520__text1711145712185">ECS</span>.<p id="EN-US_TOPIC_0093492520__p945519526717">The <span id="EN-US_TOPIC_0093492520__text16115153221015">ECS</span> details page is displayed.</p>
</li><li id="EN-US_TOPIC_0093492520__li10456652775">Click the <strong id="EN-US_TOPIC_0093492520__b3543121217263">Network Interfaces</strong> tab. Then, click <strong id="EN-US_TOPIC_0093492520__b1054321218261">Manage Virtual IP Address</strong>.<p id="EN-US_TOPIC_0093492520__p1945655213716">The <strong id="EN-US_TOPIC_0093492520__b84235270620317">Virtual Private Cloud</strong> page is displayed.</p>
</li><li id="EN-US_TOPIC_0093492520__li164562525719">On the <strong id="EN-US_TOPIC_0093492520__en-us_topic_0013859511_b84235270620338">IP Addresses</strong> tab, select a desired one or click <strong id="EN-US_TOPIC_0093492520__en-us_topic_0013859511_b84235270620420">Assign Virtual IP Address</strong> for a new one.</li><li id="EN-US_TOPIC_0093492520__li15456195216716">Click <strong id="EN-US_TOPIC_0093492520__b842352706202231">Bind to Server</strong> in the <strong id="EN-US_TOPIC_0093492520__b842352706202236">Operation</strong> column and select the target <span id="EN-US_TOPIC_0093492520__text1115255916227">ECS</span> name and the NIC to bind the virtual IP address to the <span id="EN-US_TOPIC_0093492520__text15988211256">ECS</span> NIC.<p id="EN-US_TOPIC_0093492520__p24560522078">For more information about virtual IP addresses, see <em id="EN-US_TOPIC_0093492520__i84235269714525">Virtual Private Cloud User Guide</em>.</p>
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<div class="section" id="EN-US_TOPIC_0093492521__section15259195871319"><h4 class="sectiontitle">Prerequisites</h4><p id="EN-US_TOPIC_0093492521__p286313221410">An <span id="EN-US_TOPIC_0093492521__text490432618219">EIP</span> has been bound to an <span id="EN-US_TOPIC_0093492521__text1570821221416">ECS</span>. For details, see <a href="en-us_topic_0174917535.html">Binding an EIP</a>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0093492521__section133711110961"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492521__ol675214581377"><li id="EN-US_TOPIC_0093492521__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0093492521__li464234814566">Click <span><img id="EN-US_TOPIC_0093492521__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492521__li1175265815373">Under <strong id="EN-US_TOPIC_0093492521__b17145344183813"><span id="EN-US_TOPIC_0093492521__text51441944173818">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492521__b1145154443815">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492521__li3753958153720">In the ECS list, locate the row containing the target <span id="EN-US_TOPIC_0093492521__text13576184310309">ECS</span> and choose <strong id="EN-US_TOPIC_0093492521__b9576643153012">More</strong> &gt; <strong id="EN-US_TOPIC_0093492521__b10576443123011">Manage Network</strong> &gt; <strong id="EN-US_TOPIC_0093492521__b1757714312306">Modify Bandwidth</strong> in the <strong id="EN-US_TOPIC_0093492521__b15771343103017">Operation</strong> column.</li><li id="EN-US_TOPIC_0093492521__li10261416110">Change the bandwidth name and size as prompted.</li></ol>
<div class="section" id="EN-US_TOPIC_0093492521__section133711110961"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0093492521__ol675214581377"><li id="EN-US_TOPIC_0093492521__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0093492521__li464234814566">Click <span><img id="EN-US_TOPIC_0093492521__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0093492521__li1175265815373">Under <strong id="EN-US_TOPIC_0093492521__b1585181020517"><span id="EN-US_TOPIC_0093492521__text1158514104517">Computing</span></strong>, click <strong id="EN-US_TOPIC_0093492521__b10585121013510">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0093492521__li3753958153720">In the ECS list, locate the row containing the target <span id="EN-US_TOPIC_0093492521__text13576184310309">ECS</span> and choose <strong id="EN-US_TOPIC_0093492521__b9576643153012">More</strong> &gt; <strong id="EN-US_TOPIC_0093492521__b10576443123011">Manage Network</strong> &gt; <strong id="EN-US_TOPIC_0093492521__b1757714312306">Modify Bandwidth</strong> in the <strong id="EN-US_TOPIC_0093492521__b15771343103017">Operation</strong> column.</li><li id="EN-US_TOPIC_0093492521__li10261416110">Change the bandwidth name and size as prompted.</li></ol>
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</li><li id="EN-US_TOPIC_0094118976__li16411373253">If the host where an ultra-high I/O ECS is deployed is faulty, the ECS cannot be restored through live migration.<ul id="EN-US_TOPIC_0094118976__ul14550172322517"><li id="EN-US_TOPIC_0094118976__li18942142152516">If the host is faulty or subhealthy, you need to stop the ECS for hardware repair.</li><li id="EN-US_TOPIC_0094118976__li11944122122512">In case of system maintenance or hardware faults, the ECS will be redeployed (to ensure HA) and cold migrated to another host. The local disk data of the ECS will not be retained.</li></ul>
</li><li id="EN-US_TOPIC_0094118976__li2549184113178">Ultra-high I/O ECSs do not support specification modification.</li><li id="EN-US_TOPIC_0094118976__en-us_topic_0035470099_en-us_topic_0088142885_li14386295223843">Ultra-high I/O ECSs do not support snapshots or backups of local disks.</li><li id="EN-US_TOPIC_0094118976__en-us_topic_0035470099_en-us_topic_0088142885_li18838856223614">Ultra-high I/O ECSs can use local disks, and can also have EVS disks attached to provide a larger storage size. Note the following when using the two types of storage media:<ul id="EN-US_TOPIC_0094118976__en-us_topic_0035470099_en-us_topic_0088142885_ul35331977223614"><li id="EN-US_TOPIC_0094118976__en-us_topic_0035470099_en-us_topic_0088142885_li49552340223614">Only an EVS disk, not a local disk, can be used as the system disk of an ultra-high I/O ECS.</li><li id="EN-US_TOPIC_0094118976__en-us_topic_0035470099_en-us_topic_0088142885_li43317883223614">Both EVS disks and local disks can be used as data disks of an ultra-high I/O ECS.</li><li id="EN-US_TOPIC_0094118976__li1912894412312">An ultra-high I/O ECS can have a maximum of 60 attached disks (including VBD, SCSI, and local disks). For details about constraints, see <a href="en-us_topic_0018073215.html">Can I Attach Multiple Disks to an ECS?</a></li></ul>
</li><li id="EN-US_TOPIC_0094118976__li7909173042914">You can configure the <strong id="EN-US_TOPIC_0094118976__b38401553202110">fstab</strong> file to set automatic disk mounting at ECS startup. For details, see <a href="en-us_topic_0030831989.html">Initializing EVS Data Disks</a>.</li><li id="EN-US_TOPIC_0094118976__en-us_topic_0035470099_en-us_topic_0088142885_li1717385122398">The local disk data of an ultra-high I/O ECS may be lost if an exception occurs, such as physical server breakdown or local disk damage. If your application did not use the data reliability architecture, it is a good practice to use EVS disks to build your ECS.</li><li id="EN-US_TOPIC_0094118976__li6549174117179">When an ultra-high I/O ECS is deleted, the data on local NVMe SSDs will also be automatically deleted. Back up data in advance. Deleting local disk data will increase the time needed to release resources compared with ECSs without local disks.</li><li id="EN-US_TOPIC_0094118976__li175491741191710">The reliability of local disk data depends on the reliability of physical servers and hard disks, which are SPOF-prone. It is a good practice to use data redundancy at the application layer to ensure data availability. Use EVS disks to store service data that needs to be stored for a long time.</li><li id="EN-US_TOPIC_0094118976__li7292749141819">The device name of a local disk attached to an ultra-high I/O ECS is <strong id="EN-US_TOPIC_0094118976__b5497105251714">/dev/nvme0n1</strong> or <strong id="EN-US_TOPIC_0094118976__b0503652101712">/dev/nvme0n2</strong>.</li><li id="EN-US_TOPIC_0094118976__li117233308228">The basic resources, including vCPUs, memory, and the image of an ultra-high I/O ECS will continue to be billed after the ECS is stopped. To stop the ECS from being billed, delete it and its associated resources. </li></ul>
</li><li id="EN-US_TOPIC_0094118976__li7909173042914">You can configure the <strong id="EN-US_TOPIC_0094118976__b38401553202110">fstab</strong> file to set automatic disk mounting at ECS startup. For details, see <a href="en-us_topic_0030831989.html">Initializing EVS Data Disks</a>.</li><li id="EN-US_TOPIC_0094118976__en-us_topic_0035470099_en-us_topic_0088142885_li1717385122398">The local disk data of an ultra-high I/O ECS may be lost if an exception occurs, such as physical server breakdown or local disk damage. If your application does not use the data reliability architecture, it is a good practice to use EVS disks to build your ECS.</li><li id="EN-US_TOPIC_0094118976__li6549174117179">When an ultra-high I/O ECS is deleted, the data on local NVMe SSDs will also be automatically deleted. Back up data in advance. Deleting local disk data will increase the time needed to release resources compared with ECSs without local disks.</li><li id="EN-US_TOPIC_0094118976__li175491741191710">The reliability of local disk data depends on the reliability of physical servers and hard disks, which are SPOF-prone. It is a good practice to use data redundancy at the application layer to ensure data availability. Use EVS disks to store service data that needs to be stored for a long time.</li><li id="EN-US_TOPIC_0094118976__li7292749141819">The device name of a local disk attached to an ultra-high I/O ECS is <strong id="EN-US_TOPIC_0094118976__b5497105251714">/dev/nvme0n1</strong> or <strong id="EN-US_TOPIC_0094118976__b0503652101712">/dev/nvme0n2</strong>.</li><li id="EN-US_TOPIC_0094118976__li117233308228">The basic resources, including vCPUs, memory, and the image of an ultra-high I/O ECS will continue to be billed after the ECS is stopped. To stop the ECS from being billed, delete it and its associated resources. </li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0094118976__section121148461119"><h4 class="sectiontitle">Handling Damaged Local Disks Used by I-Series ECSs</h4><p id="EN-US_TOPIC_0094118976__p398664513218">If a local disk attached to an ECS is damaged, perform the following operations to handle this issue:</p>
<p id="EN-US_TOPIC_0094118976__p16492123493916"><strong id="EN-US_TOPIC_0094118976__b16804131412409">For a Linux ECS:</strong></p>
<ol id="EN-US_TOPIC_0094118976__ol234311732020"><li id="EN-US_TOPIC_0094118976__li20761141010484">Detach the faulty local disk.<ol type="a" id="EN-US_TOPIC_0094118976__ol1235913041419"><li id="EN-US_TOPIC_0094118976__li179261022153213">Run the following command to query the mount point of the faulty disk:<p id="EN-US_TOPIC_0094118976__p62094510334"><a name="EN-US_TOPIC_0094118976__li179261022153213"></a><a name="li179261022153213"></a><strong id="EN-US_TOPIC_0094118976__b1568917273410">df –Th</strong></p>
<ol id="EN-US_TOPIC_0094118976__ol234311732020"><li id="EN-US_TOPIC_0094118976__li20761141010484">Detach the faulty local disk.<ol type="a" id="EN-US_TOPIC_0094118976__ol1235913041419"><li id="EN-US_TOPIC_0094118976__li179261022153213">Run the following command to query the mount point of the faulty disk:<p id="EN-US_TOPIC_0094118976__p62094510334"><a name="EN-US_TOPIC_0094118976__li179261022153213"></a><a name="li179261022153213"></a><strong id="EN-US_TOPIC_0094118976__b12840758436">df -Th</strong></p>
<div class="fignone" id="EN-US_TOPIC_0094118976__fig17394172431814"><a name="EN-US_TOPIC_0094118976__fig17394172431814"></a><a name="fig17394172431814"></a><span class="figcap"><b>Figure 1 </b>Querying the mount point</span><br><span><img id="EN-US_TOPIC_0094118976__image23951524181819" src="en-us_image_0000001347858206.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0094118976__li13943856181313">Run the following command to detach the faulty local disk:<p id="EN-US_TOPIC_0094118976__p394310560134"><a name="EN-US_TOPIC_0094118976__li13943856181313"></a><a name="li13943856181313"></a><strong id="EN-US_TOPIC_0094118976__b192962806534125">umount</strong> <em id="EN-US_TOPIC_0094118976__i33366480734125">mount-point</em></p>
<p id="EN-US_TOPIC_0094118976__p13943205661317">In the example shown in <a href="#EN-US_TOPIC_0094118976__fig17394172431814">Figure 1</a>, the mount point of <strong id="EN-US_TOPIC_0094118976__b147448523534125">/dev/nvme0n1</strong> is <strong id="EN-US_TOPIC_0094118976__b24601479334125">/mnt/nvme0</strong>. Run the following command:</p>

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<div class="section" id="EN-US_TOPIC_0096293655__section3374323231"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0096293655__ul89241491543"><li id="EN-US_TOPIC_0096293655__li19241491843">EVS disks are available.<p id="EN-US_TOPIC_0096293655__p33901229132713"><a name="EN-US_TOPIC_0096293655__li19241491843"></a><a name="li19241491843"></a>For instructions about how to create an EVS disk, see "Creating an EVS Disk" in <em id="EN-US_TOPIC_0096293655__i842352697215930">Elastic Volume Service User Guide</em>.</p>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0096293655__section188614152411"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0096293655__ol5143115983115"><li id="EN-US_TOPIC_0096293655__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0096293655__li464234814566">Click <span><img id="EN-US_TOPIC_0096293655__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0096293655__li1514345963117">Under <strong id="EN-US_TOPIC_0096293655__b166412471056"><span id="EN-US_TOPIC_0096293655__text8640471555">Computing</span></strong>, click <strong id="EN-US_TOPIC_0096293655__b186517471950">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0096293655__li17143459143113">In the search box above the <span id="EN-US_TOPIC_0096293655__text570533014396">ECS</span> list, enter the <span id="EN-US_TOPIC_0096293655__text15990111018551">ECS</span> name, IP address, or ID for search.</li><li id="EN-US_TOPIC_0096293655__li4144155920313">Click the name of the target <span id="EN-US_TOPIC_0096293655__text657784293913">ECS</span>.<p id="EN-US_TOPIC_0096293655__p18144205916319">The <span id="EN-US_TOPIC_0096293655__text2293724185518">ECS</span> details page is displayed.</p>
<div class="section" id="EN-US_TOPIC_0096293655__section188614152411"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0096293655__ol5143115983115"><li id="EN-US_TOPIC_0096293655__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0096293655__li464234814566">Click <span><img id="EN-US_TOPIC_0096293655__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0096293655__li1514345963117">Under <strong id="EN-US_TOPIC_0096293655__b1993294793912"><span id="EN-US_TOPIC_0096293655__text9932147113917">Computing</span></strong>, click <strong id="EN-US_TOPIC_0096293655__b1193218478399">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0096293655__li17143459143113">In the search box above the <span id="EN-US_TOPIC_0096293655__text570533014396">ECS</span> list, enter the <span id="EN-US_TOPIC_0096293655__text15990111018551">ECS</span> name, IP address, or ID for search.</li><li id="EN-US_TOPIC_0096293655__li4144155920313">Click the name of the target <span id="EN-US_TOPIC_0096293655__text657784293913">ECS</span>.<p id="EN-US_TOPIC_0096293655__p18144205916319">The <span id="EN-US_TOPIC_0096293655__text2293724185518">ECS</span> details page is displayed.</p>
</li><li id="EN-US_TOPIC_0096293655__li1114425923112">Click the <strong id="EN-US_TOPIC_0096293655__b3166031238574">Disks</strong> tab. Then, click <strong id="EN-US_TOPIC_0096293655__b62538178185745">Attach Disk</strong>.<p id="EN-US_TOPIC_0096293655__p3144159153115">The <strong id="EN-US_TOPIC_0096293655__b84235270622427">Attach Disk</strong> dialog box is displayed.</p>
<div class="fignone" id="EN-US_TOPIC_0096293655__fig1332144315348"><span class="figcap"><b>Figure 1 </b>Attach Disk</span><br><span><img id="EN-US_TOPIC_0096293655__image7303181915103" src="en-us_image_0000002351494384.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0096293655__li19144105919315">Select the target disk and specify the disk as the system disk or data disk.<div class="note" id="EN-US_TOPIC_0096293655__note105791934312"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0096293655__ul1557913920439"><li id="EN-US_TOPIC_0096293655__li105793912435">If no EVS disks are available, click <strong id="EN-US_TOPIC_0096293655__b1932368999">Create Disk</strong> in the lower part of the list.</li><li id="EN-US_TOPIC_0096293655__li85798934317">For details about constraints on attaching disks, see <a href="en-us_topic_0040863659.html">What Are the Requirements for Attaching an EVS Disk to an ECS?</a></li><li id="EN-US_TOPIC_0096293655__li057959184316">The device names for the local disks and EVS disks attached to a disk-intensive ECS comply with the following rules:<ul id="EN-US_TOPIC_0096293655__ul357969164315"><li id="EN-US_TOPIC_0096293655__li1357989174314">System disk: Use sda or vda.</li><li id="EN-US_TOPIC_0096293655__li155793934315">Local disk: Use the device name following sda or vda in alphabetical order.</li><li id="EN-US_TOPIC_0096293655__li10579179194315">EVS disk: Use the device name added in alphabetical order following those used by local disks.</li></ul>
</li><li id="EN-US_TOPIC_0096293655__li19144105919315">Select the target disk and specify the disk as the system disk or data disk.<div class="note" id="EN-US_TOPIC_0096293655__note105791934312"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0096293655__ul1557913920439"><li id="EN-US_TOPIC_0096293655__li105793912435">If no EVS disks are available, click <strong id="EN-US_TOPIC_0096293655__b1784958819">Create Disk</strong> in the lower part of the list.</li><li id="EN-US_TOPIC_0096293655__li85798934317">For details about constraints on attaching disks, see <a href="en-us_topic_0040863659.html">What Are the Requirements for Attaching an EVS Disk to an ECS?</a></li><li id="EN-US_TOPIC_0096293655__li057959184316">The device names for the local disks and EVS disks attached to a disk-intensive ECS comply with the following rules:<ul id="EN-US_TOPIC_0096293655__ul357969164315"><li id="EN-US_TOPIC_0096293655__li1357989174314">System disk: Use sda or vda.</li><li id="EN-US_TOPIC_0096293655__li155793934315">Local disk: Use the device name following sda or vda in alphabetical order.</li><li id="EN-US_TOPIC_0096293655__li10579179194315">EVS disk: Use the device name added in alphabetical order following those used by local disks.</li></ul>
</li></ul>
</div></div>
</li><li id="EN-US_TOPIC_0096293655__li378881832719">Click <strong id="EN-US_TOPIC_0096293655__b84235270611586">OK</strong>.<p id="EN-US_TOPIC_0096293655__p27881518102716">After the disk is attached, you can view the information about it on the <strong id="EN-US_TOPIC_0096293655__b84235270694114">Disks</strong> tab.</p>

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<tbody><tr id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_row190153318123"><td class="cellrowborder" valign="top" width="25.91%" headers="mcps1.3.2.2.5.3.2.3.1.1 "><p id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_p156591952159">Encryption</p>
</td>
<td class="cellrowborder" valign="top" width="74.09%" headers="mcps1.3.2.2.5.3.2.3.1.2 "><p id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_p96591652653">This parameter specifies whether the image will be encrypted. The value is provided by the system and cannot be changed.</p>
<ul id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_ul94161232191418"><li id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_li54161732131420">Only an unencrypted private image can be created from an unencrypted ECS.</li><li id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_li19177153818141">Only an encrypted private image can be created from an encrypted ECS.</li></ul>
<ul id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_ul94161232191418"><li id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_li54161732131420">A private image created using an unencrypted <span id="EN-US_TOPIC_0101604508__text2087243819109">ECS</span> is an unencrypted private image.</li><li id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_li19177153818141">A private image created using an encrypted <span id="EN-US_TOPIC_0101604508__text135784118112">ECS</span> is an encrypted private image.</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_row36593522511"><td class="cellrowborder" valign="top" width="25.91%" headers="mcps1.3.2.2.5.3.2.3.1.1 "><p id="EN-US_TOPIC_0101604508__en-us_topic_0030713149_p19659452051">Name</p>

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</div>
<div class="section" id="EN-US_TOPIC_0133339807__section205851733132119"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0133339807__ul6865640131012"><li id="EN-US_TOPIC_0133339807__li19865340181017">The <span id="EN-US_TOPIC_0133339807__text54171460221">ECS</span> must be stopped.</li><li id="EN-US_TOPIC_0133339807__li17865174012100">If a virtual IP address or DNAT rule has been configured for the NIC, cancel the configuration before modifying the private IP address.</li><li id="EN-US_TOPIC_0133339807__li786574020101">If the NIC has an IPv6 address, its private IP address (IPv4 or IPv6 address) cannot be modified.</li><li id="EN-US_TOPIC_0133339807__li064713455290">To change the private IP address for a backend server of a load balancer, remove the backend server from the backend server group first.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0133339807__section101008535219"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0133339807__ol8759315103012"><li id="EN-US_TOPIC_0133339807__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0133339807__li079521816378">Under <strong id="EN-US_TOPIC_0133339807__b1027919824615"><span id="EN-US_TOPIC_0133339807__text52791184460">Computing</span></strong>, click <strong id="EN-US_TOPIC_0133339807__b162791854612">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0133339807__li4796171815377">Click the name of the target <span id="EN-US_TOPIC_0133339807__text36748472229">ECS</span>.<p id="EN-US_TOPIC_0133339807__p1979631813379">The ECS details page is displayed.</p>
<div class="section" id="EN-US_TOPIC_0133339807__section101008535219"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0133339807__ol8759315103012"><li id="EN-US_TOPIC_0133339807__li12083261325">Log in to the management console.</li><li id="EN-US_TOPIC_0133339807__li464234814566">Click <span><img id="EN-US_TOPIC_0133339807__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0133339807__li3208182613210">Under <strong id="EN-US_TOPIC_0133339807__b8772340114419"><span id="EN-US_TOPIC_0133339807__text3772440154415">Computing</span></strong>, click <strong id="EN-US_TOPIC_0133339807__b137721401442">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0133339807__li4796171815377">Click the name of the target <span id="EN-US_TOPIC_0133339807__text36748472229">ECS</span>.<p id="EN-US_TOPIC_0133339807__p1979631813379">The ECS details page is displayed.</p>
</li><li id="EN-US_TOPIC_0133339807__li147961818103717">Click the <strong id="EN-US_TOPIC_0133339807__b79366495156">Network Interfaces</strong> tab. Locate the row containing the network interface and click <strong id="EN-US_TOPIC_0133339807__b1393774910159">Modify Private IP</strong>.<p id="EN-US_TOPIC_0133339807__p879613351339">The <strong id="EN-US_TOPIC_0133339807__b3659439143310">Modify Private IP</strong> dialog box is displayed.</p>
<div class="fignone" id="EN-US_TOPIC_0133339807__fig1588191982013"><span class="figcap"><b>Figure 1 </b>Modifying the private IP address</span><br><span><img id="EN-US_TOPIC_0133339807__image134771147202814" src="en-us_image_0000002351670516.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0133339807__li113671409339">Change the subnet and private IP address of the NIC as required.<div class="note" id="EN-US_TOPIC_0133339807__note4426122311010"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0133339807__p5426723121013">Subnets can be changed only within the same VPC.</p>

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</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0140313880__section476518231167"><h4 class="sectiontitle">Disk Types</h4><p id="EN-US_TOPIC_0140313880__en-us_topic_0030828256_p527152612594">EVS disk types differ in performance. Choose a disk type based on your requirements.</p>
<p id="EN-US_TOPIC_0140313880__en-us_topic_0030828256_p319318211216">For more information about EVS disk specifications and performance, see <em id="EN-US_TOPIC_0140313880__i1856295319913">Elastic Volume Service User Guide</em>.</p>
<p id="EN-US_TOPIC_0140313880__en-us_topic_0030828256_p319318211216">For more information about EVS disk specifications and performance, see <em id="EN-US_TOPIC_0140313880__i156014319257">Elastic Volume Service User Guide</em>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0140313880__section64489635143430"><h4 class="sectiontitle">Device Types</h4><p id="EN-US_TOPIC_0140313880__en-us_topic_0044524737_p34112123101858">EVS disks have two device types, Virtual Block Device (VBD) and Small Computer System Interface (SCSI).</p>
<div class="p" id="EN-US_TOPIC_0140313880__p99704435360"><ul id="EN-US_TOPIC_0140313880__en-us_topic_0044524737_en-us_topic_0052554220_ul3420094547"><li id="EN-US_TOPIC_0140313880__li10683144144344">VBD:<p id="EN-US_TOPIC_0140313880__p30971269144345"><a name="EN-US_TOPIC_0140313880__li10683144144344"></a><a name="li10683144144344"></a>When you create an EVS disk on the management console, <strong id="EN-US_TOPIC_0140313880__b13486112614354">Device Type</strong> of the EVS disk is VBD by default. VBD EVS disks support only simple SCSI read/write commands.</p>

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</div>
<div class="section" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_section1967161905116"><a name="EN-US_TOPIC_0140963099__en-us_topic_0129883696_section1967161905116"></a><a name="en-us_topic_0129883696_section1967161905116"></a><h4 class="sectiontitle">Enabling IPv6 for an ECS</h4><div class="note" id="EN-US_TOPIC_0140963099__note1177116393269"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0140963099__p6772123942620">After IPv6 is enabled on the subnet where the ECS works, an IPv6 CIDR block is automatically assigned to the subnet. IPv6 cannot be disabled once it is enabled.</p>
</div></div>
<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol1014975793617"><li id="EN-US_TOPIC_0140963099__li1151341720102">Log in to the management console.</li></ol><ol start="2" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol169051320185719"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li840318282158">Click <span><img id="EN-US_TOPIC_0140963099__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li1439732155817">Under <strong id="EN-US_TOPIC_0140963099__en-us_topic_0093492518_b1647693317811"><span id="EN-US_TOPIC_0140963099__en-us_topic_0093492518_text1547614331181">Computing</span></strong>, click <strong id="EN-US_TOPIC_0140963099__en-us_topic_0093492518_b5477433581">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li7398152135819">Click the target ECS to go to the ECS details page.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li8398152119583">In the <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1780512112330">ECS Information</strong> area, click the VPC name. The VPC list is displayed.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li65456006193847">Click the number in the <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1376014351383">Subnets</strong> column.<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p536311715204">The <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1966365411359">Subnets</strong> page is displayed.</p>
<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol1014975793617"><li id="EN-US_TOPIC_0140963099__li1151341720102">Log in to the management console.</li></ol><ol start="2" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol169051320185719"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li840318282158">Click <span><img id="EN-US_TOPIC_0140963099__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li1439732155817">Under <strong id="EN-US_TOPIC_0140963099__en-us_topic_0093492518_b1729519104410"><span id="EN-US_TOPIC_0140963099__en-us_topic_0093492518_text772910198448">Computing</span></strong>, click <strong id="EN-US_TOPIC_0140963099__en-us_topic_0093492518_b572921915449">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li7398152135819">Click the target ECS to go to the ECS details page.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li8398152119583">In the <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1780512112330">ECS Information</strong> area, click the VPC name. The VPC list is displayed.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li65456006193847">Click the number in the <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1376014351383">Subnets</strong> column.<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p536311715204">The <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1966365411359">Subnets</strong> page is displayed.</p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li1696335192013">In the subnet list, locate the target subnet and click its name.<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p057455682116"><a name="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li1696335192013"></a><a name="en-us_topic_0129883696_li1696335192013"></a>The subnet details page is displayed.</p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li17430154619011">In the <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b049684643716">Subnet Information</strong> area, click <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b13272195016375">Enable</strong> for <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b11562155713520">IPv6 CIDR Block</strong>.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li3499420113">Click <strong id="EN-US_TOPIC_0140963099__b14833545984">OK</strong>.</li></ol>
</div>
@ -109,7 +109,7 @@
</p></li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li615511220439"><a name="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li615511220439"></a><a name="en-us_topic_0129883696_li615511220439"></a><span>Enable IPv6 for the ECS.</span><p><ol type="a" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol14994893916"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li11992813395">Run the following command to check whether IPv6 is enabled for the kernel:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p14355731113918"><a name="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li11992813395"></a><a name="en-us_topic_0129883696_li11992813395"></a><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b89771818114320">sysctl -a | grep ipv6</strong></p>
<ul id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ul163471252104019"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li715713543409">If a command output is displayed, IPv6 is enabled.</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li103471652204014">If no information is displayed, IPv6 is disabled. Go to <a href="#EN-US_TOPIC_0140963099__en-us_topic_0129883696_li193875248395">2.b</a> to load the IPv6 module.</li></ul>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li193875248395"><a name="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li193875248395"></a><a name="en-us_topic_0129883696_li193875248395"></a>Run the following command to load the IPv6 module:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p1324817575428"><a name="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li193875248395"></a><a name="en-us_topic_0129883696_li193875248395"></a><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b188615248431">modprobe ipv6</strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li1470132343917">Add the following content to the <strong id="EN-US_TOPIC_0140963099__b1586130190">/etc/sysctl.conf</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p179151816436"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1281730174313">net.ipv6.conf.all.disable_ipv6=0</strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li1470132343917">Add the following content to the <strong id="EN-US_TOPIC_0140963099__b898211100">/etc/sysctl.conf</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p179151816436"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1281730174313">net.ipv6.conf.all.disable_ipv6=0</strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li27518229393">Save the configuration and exit. Then, run the following command to load the configuration:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p117092119439"><a name="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li27518229393"></a><a name="en-us_topic_0129883696_li27518229393"></a><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b8287434184320">sysctl -p</strong></p>
</li></ol>
</p></li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li732702252514"><span>Enable dynamic IPv6 address assignment for the ECS.</span><p><ul id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ul168021435112516"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li64311356152">Ubuntu 18.04/20.04<ol type="a" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol143111351155"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li719711710174">Run the following command to access <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b196182209539">/etc/netplan/</strong>:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p9342192771719"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1977131131819">cd /etc/netplan</strong></p>
@ -195,15 +195,15 @@ DHCPV6C=yes</pre>
<ul id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ul15881151616011"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li2088110161020">CentOS 6.<em id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_i959817122058">x</em>:<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol51981660410"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li29287380818">Run the following command to edit the <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_en-us_topic_0029124569_b4949258417571">dhclient.conf</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p1839771699"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b68271759885">vi /etc/dhcp/dhclient.conf</strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li16198463414">Press <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b362010249514">i</strong> to enter editing mode and add the timeout attribute to the file.<pre class="screen" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_screen3345125478">timeout 30;</pre>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li5198061049">Enter <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b842352706154629">:wq</strong> to save the settings and exit.</li></ol>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li167681631604">Debian 7.5:<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol81697117102"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li191691211181011">Run the following command to edit the <strong id="EN-US_TOPIC_0140963099__b1278519068">networking</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p18793537097"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1279413715912">vi /etc/init.d/networking</strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li167681631604">Debian 7.5:<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol81697117102"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li191691211181011">Run the following command to edit the <strong id="EN-US_TOPIC_0140963099__b204803170">networking</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p18793537097"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b1279413715912">vi /etc/init.d/networking</strong></p>
</li></ol><ol start="2" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol589431271017"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li1189418123107">Press <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b84235270616158">i</strong> to enter editing mode and add the timeout attribute.<div class="fignone" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_fig754774645719"><span class="figcap"><b>Figure 20 </b>Modification 1</span><br><span><img id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_image4547174615710" src="en-us_image_0000001723492326.png" title="Click to enlarge" class="imgResize"></span></div>
<div class="fignone" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_fig14593974597"><span class="figcap"><b>Figure 21 </b>Modification 2</span><br><span><img id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_image6593137195918" src="en-us_image_0000001771211517.png" title="Click to enlarge" class="imgResize"></span></div>
</li></ol>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li72971749308">Debian 8.2.0/8.8.0<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol1673185320103"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li51561857171017">Run the following command to edit the <strong id="EN-US_TOPIC_0140963099__b482774736">network-pre.conf</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p1158165712108"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b916015577105">vi <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b12865142712116">/lib/systemd/system/networking.service.d/network-pre.conf</strong></strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li72971749308">Debian 8.2.0/8.8.0<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol1673185320103"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li51561857171017">Run the following command to edit the <strong id="EN-US_TOPIC_0140963099__b992536023">network-pre.conf</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p1158165712108"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b916015577105">vi <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b12865142712116">/lib/systemd/system/networking.service.d/network-pre.conf</strong></strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li111615573106">Press <em id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_i84235269715467">i</em> to enter editing mode and add the timeout attribute to the file.<pre class="screen" id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_screen5164155731011">[Service]
TimeoutStartSec=30</pre>
</li></ol>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li746771616117">Debian 9.0<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol167421735171215"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li174713352125">Run the following command to edit the <strong id="EN-US_TOPIC_0140963099__b1044597351">networking.service</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p175113517123"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b157537354128">vi /etc/system/system/network-online.target.wants/networking.service</strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li746771616117">Debian 9.0<ol id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_ol167421735171215"><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li174713352125">Run the following command to edit the <strong id="EN-US_TOPIC_0140963099__b226952362">networking.service</strong> file:<p id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_p175113517123"><strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b157537354128">vi /etc/system/system/network-online.target.wants/networking.service</strong></p>
</li><li id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_li11756103519125">Press <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b842352706155556">i</strong> to enter editing mode and change <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b842352706155640">TimeoutStartSec=5min</strong> to <strong id="EN-US_TOPIC_0140963099__en-us_topic_0129883696_b842352706155644">TimeoutStartSec=30</strong>.</li></ol>
</li></ul>
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</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0206596990__section1231113458914"><h4 class="sectiontitle">How Do I Check Host Security Statuses?</h4><p id="EN-US_TOPIC_0206596990__p178333484590">On the <strong id="EN-US_TOPIC_0206596990__b3660025164714">Server</strong> tab, you can view the ECS security statuses in the current region.</p>
<ol id="EN-US_TOPIC_0206596990__ol294515491112"><li id="EN-US_TOPIC_0206596990__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0206596990__en-us_topic_0093492517_li1168746173718">Click <span><img id="EN-US_TOPIC_0206596990__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0206596990__en-us_topic_0093492517_li206871564372">Click <span><img id="EN-US_TOPIC_0206596990__image13390184414418" src="en-us_image_0000001526737785.jpg"></span> and choose <strong id="EN-US_TOPIC_0206596990__b471051205618">Security</strong> &gt; <strong id="EN-US_TOPIC_0206596990__b116413315112">Host Security Service</strong>.</li><li id="EN-US_TOPIC_0206596990__li12224769218">Choose <strong id="EN-US_TOPIC_0206596990__b285272855612">Asset Management</strong> &gt; <strong id="EN-US_TOPIC_0206596990__b178521328125612">Servers &amp; Quota</strong> &gt; <strong id="EN-US_TOPIC_0206596990__b1785252895619">Servers</strong> to view the security statuses of target servers.
<ol id="EN-US_TOPIC_0206596990__ol294515491112"><li id="EN-US_TOPIC_0206596990__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0206596990__en-us_topic_0093492517_li1168746173718">Click <span><img id="EN-US_TOPIC_0206596990__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0206596990__en-us_topic_0093492517_li206871564372">Under <strong id="EN-US_TOPIC_0206596990__b471051205618">Security</strong>, click <strong id="EN-US_TOPIC_0206596990__b116413315112">Host Security Service</strong>.</li><li id="EN-US_TOPIC_0206596990__li12224769218">Choose <strong id="EN-US_TOPIC_0206596990__b285272855612">Asset Management</strong> &gt; <strong id="EN-US_TOPIC_0206596990__b178521328125612">Servers &amp; Quota</strong> &gt; <strong id="EN-US_TOPIC_0206596990__b1785252895619">Servers</strong> to view the security statuses of target servers.
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0206596990__table1517633611414" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Statuses</caption><thead align="left"><tr id="EN-US_TOPIC_0206596990__row1517663616420"><th align="left" class="cellrowborder" valign="top" width="19.05%" id="mcps1.3.3.3.4.4.2.3.1.1"><p id="EN-US_TOPIC_0206596990__p717753612413">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="80.95%" id="mcps1.3.3.3.4.4.2.3.1.2"><p id="EN-US_TOPIC_0206596990__p141770361049">Description</p>
@ -23,18 +23,18 @@
</thead>
<tbody><tr id="EN-US_TOPIC_0206596990__row81778363417"><td class="cellrowborder" valign="top" width="19.05%" headers="mcps1.3.3.3.4.4.2.3.1.1 "><p id="EN-US_TOPIC_0206596990__p217743620412">Agent Status</p>
</td>
<td class="cellrowborder" valign="top" width="80.95%" headers="mcps1.3.3.3.4.4.2.3.1.2 "><ul id="EN-US_TOPIC_0206596990__ul6177153620419"><li id="EN-US_TOPIC_0206596990__li1917753611410"><strong id="EN-US_TOPIC_0206596990__b87115531">Not installed</strong>: The agent has not been started or even has not been installed.</li><li id="EN-US_TOPIC_0206596990__li1517753615413"><strong id="EN-US_TOPIC_0206596990__b468122260">Online</strong>: The agent is running properly.</li><li id="EN-US_TOPIC_0206596990__li317711365420"><strong id="EN-US_TOPIC_0206596990__b1842608253">Offline</strong>: The agent fails to communicate with the HSS server. Therefore, HSS cannot protect your ECS.<p id="EN-US_TOPIC_0206596990__p18177203612414">Click <strong id="EN-US_TOPIC_0206596990__b1564041616">Offline</strong>. Then, the ECSs with agent being offline and the offline reasons are displayed.</p>
<td class="cellrowborder" valign="top" width="80.95%" headers="mcps1.3.3.3.4.4.2.3.1.2 "><ul id="EN-US_TOPIC_0206596990__ul6177153620419"><li id="EN-US_TOPIC_0206596990__li1917753611410"><strong id="EN-US_TOPIC_0206596990__b1318298768">Not installed</strong>: The agent has not been started or even has not been installed.</li><li id="EN-US_TOPIC_0206596990__li1517753615413"><strong id="EN-US_TOPIC_0206596990__b1719613513">Online</strong>: The agent is running properly.</li><li id="EN-US_TOPIC_0206596990__li317711365420"><strong id="EN-US_TOPIC_0206596990__b147973706">Offline</strong>: The agent fails to communicate with the HSS server. Therefore, HSS cannot protect your ECS.<p id="EN-US_TOPIC_0206596990__p18177203612414">Click <strong id="EN-US_TOPIC_0206596990__b1687162635">Offline</strong>. Then, the ECSs with agent being offline and the offline reasons are displayed.</p>
</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0206596990__row617715364412"><td class="cellrowborder" valign="top" width="19.05%" headers="mcps1.3.3.3.4.4.2.3.1.1 "><p id="EN-US_TOPIC_0206596990__p2017715362415">Protection Status</p>
</td>
<td class="cellrowborder" valign="top" width="80.95%" headers="mcps1.3.3.3.4.4.2.3.1.2 "><ul id="EN-US_TOPIC_0206596990__ul717713361344"><li id="EN-US_TOPIC_0206596990__li11477165010512"><strong id="EN-US_TOPIC_0206596990__b217142560">Protected</strong>: The ECS is fully protected by HSS.</li><li id="EN-US_TOPIC_0206596990__li14483115014512"><strong id="EN-US_TOPIC_0206596990__b6819163125315">Unprotected</strong>: HSS is disabled for the ECS. After the agent is installed, click <strong id="EN-US_TOPIC_0206596990__b7917192235315">Enable</strong> in the <strong id="EN-US_TOPIC_0206596990__b13843152675310">Operation</strong> column to enable protection.</li><li id="EN-US_TOPIC_0206596990__li1193885861213"><strong id="EN-US_TOPIC_0206596990__b2756658185520">Protection interrupted</strong>: The ECS is not protected, because the HSS protection server is interrupted. You can hover the cursor on <span><img id="EN-US_TOPIC_0206596990__image18960163118136" src="en-us_image_0000002039480781.png"></span> next to <strong id="EN-US_TOPIC_0206596990__b1355012117593">Protection interrupted</strong> to view the cause.</li></ul>
<td class="cellrowborder" valign="top" width="80.95%" headers="mcps1.3.3.3.4.4.2.3.1.2 "><ul id="EN-US_TOPIC_0206596990__ul717713361344"><li id="EN-US_TOPIC_0206596990__li11477165010512"><strong id="EN-US_TOPIC_0206596990__b2052388176">Protected</strong>: The ECS is fully protected by HSS.</li><li id="EN-US_TOPIC_0206596990__li14483115014512"><strong id="EN-US_TOPIC_0206596990__b6819163125315">Unprotected</strong>: HSS is disabled for the ECS. After the agent is installed, click <strong id="EN-US_TOPIC_0206596990__b7917192235315">Enable</strong> in the <strong id="EN-US_TOPIC_0206596990__b13843152675310">Operation</strong> column to enable protection.</li><li id="EN-US_TOPIC_0206596990__li1193885861213"><strong id="EN-US_TOPIC_0206596990__b2756658185520">Protection interrupted</strong>: The ECS is not protected, because the HSS protection server is interrupted. You can hover the cursor on <span><img id="EN-US_TOPIC_0206596990__image18960163118136" src="en-us_image_0000002039480781.png"></span> next to <strong id="EN-US_TOPIC_0206596990__b1355012117593">Protection interrupted</strong> to view the cause.</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0206596990__row111778365417"><td class="cellrowborder" valign="top" width="19.05%" headers="mcps1.3.3.3.4.4.2.3.1.1 "><p id="EN-US_TOPIC_0206596990__p15177143613415">Scan Results</p>
</td>
<td class="cellrowborder" valign="top" width="80.95%" headers="mcps1.3.3.3.4.4.2.3.1.2 "><ul id="EN-US_TOPIC_0206596990__ul817893614417"><li id="EN-US_TOPIC_0206596990__li9178113615418"><strong id="EN-US_TOPIC_0206596990__b665987763">Risky</strong>: The ECS is risky.</li><li id="EN-US_TOPIC_0206596990__li8178636747"><strong id="EN-US_TOPIC_0206596990__b2006365601">Safe</strong>: No risks are detected.</li><li id="EN-US_TOPIC_0206596990__li21781236344"><strong id="EN-US_TOPIC_0206596990__b579774784">Pending risk detection</strong>: HSS is not enabled for the ECS.</li></ul>
<td class="cellrowborder" valign="top" width="80.95%" headers="mcps1.3.3.3.4.4.2.3.1.2 "><ul id="EN-US_TOPIC_0206596990__ul817893614417"><li id="EN-US_TOPIC_0206596990__li9178113615418"><strong id="EN-US_TOPIC_0206596990__b1028208055">Risky</strong>: The ECS is risky.</li><li id="EN-US_TOPIC_0206596990__li8178636747"><strong id="EN-US_TOPIC_0206596990__b1278376319">Safe</strong>: No risks are detected.</li><li id="EN-US_TOPIC_0206596990__li21781236344"><strong id="EN-US_TOPIC_0206596990__b379398875">Pending risk detection</strong>: HSS is not enabled for the ECS.</li></ul>
</td>
</tr>
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<div class="caution" id="EN-US_TOPIC_0240543420__note1387665611146"><span class="cautiontitle"><img src="public_sys-resources/caution_3.0-en-us.png"> </span><div class="cautionbody"><p id="EN-US_TOPIC_0240543420__p11876356191413"><span id="EN-US_TOPIC_0240543420__text781165971419">After an EIP is <span id="EN-US_TOPIC_0240543420__text2908151216150">unbound</span> from an ECS, the ECS can no longer access the public network. Before unbinding an EIP, ensure that the ECS does not need to access the public network or an alternative network connection is available.</span></p>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0240543420__section48525176566"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0240543420__ol202731448155617"><li id="EN-US_TOPIC_0240543420__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0240543420__li1627314817568">Click <span><img id="EN-US_TOPIC_0240543420__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0240543420__li6273104817566">Under <strong id="EN-US_TOPIC_0240543420__b955761520380"><span id="EN-US_TOPIC_0240543420__text135578155387">Computing</span></strong>, click <strong id="EN-US_TOPIC_0240543420__b11557151518380">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0240543420__li3753958153720">In the ECS list on the <strong id="EN-US_TOPIC_0240543420__b1517754152811">Elastic Cloud Server</strong> page, click the name of the target <span id="EN-US_TOPIC_0240543420__text4517165420288">ECS</span>.<p id="EN-US_TOPIC_0240543420__p19272133511129">The ECS details page is displayed.</p>
<div class="section" id="EN-US_TOPIC_0240543420__section48525176566"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0240543420__ol202731448155617"><li id="EN-US_TOPIC_0240543420__li1151341720102">Log in to the management console.</li><li id="EN-US_TOPIC_0240543420__li1627314817568">Click <span><img id="EN-US_TOPIC_0240543420__en-us_topic_0000001825604541_image9499446838" src="en-us_image_0000002188678994.png"></span> in the upper left corner and select a region and project.</li><li id="EN-US_TOPIC_0240543420__li6273104817566">Under <strong id="EN-US_TOPIC_0240543420__b778117551648"><span id="EN-US_TOPIC_0240543420__text117811055348">Computing</span></strong>, click <strong id="EN-US_TOPIC_0240543420__b1678118551843">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0240543420__li3753958153720">In the ECS list on the <strong id="EN-US_TOPIC_0240543420__b1517754152811">Elastic Cloud Server</strong> page, click the name of the target <span id="EN-US_TOPIC_0240543420__text4517165420288">ECS</span>.<p id="EN-US_TOPIC_0240543420__p19272133511129">The ECS details page is displayed.</p>
</li><li id="EN-US_TOPIC_0240543420__li3892185712241">On the <strong id="EN-US_TOPIC_0240543420__b639166153010">EIPs</strong> tab, locate the row containing the EIP to be unbound and click <strong id="EN-US_TOPIC_0240543420__b2985134710309">Unbind</strong>.<div class="fignone" id="EN-US_TOPIC_0240543420__fig2014713124169"><span class="figcap"><b>Figure 1 </b>Unbinding an EIP</span><br><span><img id="EN-US_TOPIC_0240543420__image591183153618" src="en-us_image_0000002351518800.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0240543420__li12738487568">Confirm the EIP to be unbound and click <strong id="EN-US_TOPIC_0240543420__b1443624862120">OK</strong>.</li></ol>
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