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ER UMN 20250126 version

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Reviewed-by: Sarda, Priya <prsarda@noreply.gitea.eco.tsi-dev.otc-service.com>
Co-authored-by: fanqinying <fanqinying@huawei.com>
Co-committed-by: fanqinying <fanqinying@huawei.com>
This commit is contained in:
Qin Ying, Fan
2025-05-19 17:36:38 +00:00
committed by zuul
parent e82406468b
commit 64e70217dd
83 changed files with 949 additions and 639 deletions
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</th>
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<tbody><tr id="UgChangeHistory__row177814312405"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p126541534134012">2024-10-08</p>
<tbody><tr id="UgChangeHistory__row166353178335"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p164562383317">2025-05-19</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p164512383316">Modified the following content:</p>
<p id="UgChangeHistory__p294219345335">Modified the CFW instance deletion operations in <a href="er_01_0180.html">Deleting a CFW Instance Attachment</a>.</p>
</td>
</tr>
<tr id="UgChangeHistory__row22699132322"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p9227121793216">2025-04-22</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p2018915251320">Modified the following content:</p>
<ul id="UgChangeHistory__ul11189182516329"><li id="UgChangeHistory__li1918918257328">Added the unit and conversion rule of monitoring metrics in <a href="er_01_0103.html">Supported Metrics</a>.</li></ul>
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</tr>
<tr id="UgChangeHistory__row272273613228"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p942264122214">2025-04-14</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p542284111225">Modified the following content:</p>
<ul id="UgChangeHistory__ul9423941132213"><li id="UgChangeHistory__li17423241142218">Optimized the metric description in <a href="er_01_0103.html">Supported Metrics</a>.</li><li id="UgChangeHistory__li19423194122215">Updated the quota screenshot in <a href="er_01_0057.html">Viewing Quotas</a>.</li></ul>
</td>
</tr>
<tr id="UgChangeHistory__row117491724161711"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p772112285178">2025-04-11</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p10722928141718">Modified the following content:</p>
<ul id="UgChangeHistory__ul472282811173"><li id="UgChangeHistory__li57223283178">Modified the CFW instance deletion operations in <a href="er_01_0180.html">Deleting a CFW Instance Attachment</a>.</li><li id="UgChangeHistory__li072215285177">Modified the scenarios in <a href="er_01_0013.html">Modifying an Enterprise Router</a>.</li></ul>
</td>
</tr>
<tr id="UgChangeHistory__row169967535327"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p20996145314326">2025-04-01</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p1349516223310">Modified the following content:</p>
<ul id="UgChangeHistory__ul1049617213332"><li id="UgChangeHistory__li14961121337">Adjusted the table format in <a href="er_01_0063.html">Step 1: Plan Networks and Resources</a>.</li><li id="UgChangeHistory__li1716385918405">Added constraints in <a href="er_01_0031.html">Creating an Association for an Attachment in a Route Table</a> and <a href="er_01_0036.html">Creating a Propagation for an Attachment in the Route Table</a>.</li></ul>
</td>
</tr>
<tr id="UgChangeHistory__row13555133215214"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p1655518322527">2025-03-18</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p5792141165218">Modified the following content:</p>
<ul id="UgChangeHistory__ul5792141135220"><li id="UgChangeHistory__li27921841165214">Added the CFW instance attachment screenshot in <a href="er_01_0021.html">Viewing an Attachment</a>.</li><li id="UgChangeHistory__li1377812171506">Modified the description of creating an association in <a href="er_01_0030.html">Association Overview</a>.</li><li id="UgChangeHistory__li10620018175">Added the description about CFW instance attachments in <a href="er_01_0011.html">How Enterprise Routers Work</a>, <a href="er_01_0031.html">Creating an Association for an Attachment in a Route Table</a>, and <a href="er_01_0036.html">Creating a Propagation for an Attachment in the Route Table</a>.</li><li id="UgChangeHistory__li08469313408">Added traces related to <strong id="UgChangeHistory__b4977143310403">erTag</strong> in <a href="er_01_0091.html">Key Operations Recorded by CTS</a>.</li><li id="UgChangeHistory__li389241755512">Added parameter description in <a href="er_01_0093.html">Modifying the Basic Information of an Attachment</a>.</li></ul>
</td>
</tr>
<tr id="UgChangeHistory__row2013317521879"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p181337527718">2025-02-27</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p141331525713">Modified the following content:</p>
<ul id="UgChangeHistory__ul10693131974214"><li id="UgChangeHistory__li12693419134212">Added the VPC attachment screenshot in <a href="er_01_0021.html">Viewing an Attachment</a>.</li><li id="UgChangeHistory__li15693171913420">Added the CFW instance attachment parameter and description in <a href="er_01_0041.html">Creating a Static Route</a> and <a href="er_01_0042.html">Modifying a Static Route</a>.</li></ul>
</td>
</tr>
<tr id="UgChangeHistory__row152611233114319"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p126123315432">2025-01-23</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p01284810435">Modified the following content:</p>
<ul id="UgChangeHistory__ul7758193154415"><li id="UgChangeHistory__li147581431446">Added the description of CFW instance attachments in <a href="er_01_0005.html">Functions</a>, <a href="er_01_0011.html">How Enterprise Routers Work</a>, <a href="er_01_0009.html">Enterprise Router and Other Services</a>, <a href="er_01_0019.html">Attachment Overview</a>, <a href="er_01_0179.html">Creating a CFW Instance Attachment</a>, <a href="er_01_0180.html">Deleting a CFW Instance Attachment</a>, <a href="er_01_0030.html">Association Overview</a>, <a href="er_01_0035.html">Propagation Overview</a>, and <a href="er_01_0040.html">Route Overview</a>.</li><li id="UgChangeHistory__li9132133819444">Added the description of flow logs supported for VPN gateways in <a href="er_01_0005.html">Functions</a>, <a href="er_01_0108.html">Flow Log Overview</a>, and <a href="er_01_0109.html">Creating a Flow Log</a>.</li></ul>
</td>
</tr>
<tr id="UgChangeHistory__row177814312405"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p126541534134012">2024-10-08</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p166545344406">Modified the following content:</p>
<p id="UgChangeHistory__p965415343407">Modified the screenshot about the quota page in <a href="er_01_0057.html">Viewing Quotas</a>.</p>

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<a name="er_01_0002"></a><a name="er_01_0002"></a>
<h1 class="topictitle1">What Is an Enterprise Router?</h1>
<div id="body0000001135016056"><div class="p" id="er_01_0002__p595713314813">An enterprise router connects VPCs and on-premises networks to build a central hub network. It has high specifications, provides high bandwidth, and delivers high performance. Enterprise routers use the Border Gateway Protocol (BGP) to learn, dynamically select, or switch between routes, thereby ensuring the service continuity and significantly improving network scalability and O&amp;M efficiency.
<div id="body0000001135016056"><div class="p" id="er_01_0002__p595713314813">An enterprise router connects VPCs and on-premises networks to set up a central hub network. It has high specifications, provides high bandwidth, and delivers high performance. Enterprise routers use the Border Gateway Protocol (BGP) to learn, dynamically select, or switch between routes, thereby ensuring the service continuity and significantly improving network scalability and O&amp;M efficiency.
</div>
<div class="p" id="er_01_0002__p260314331077"><a href="#er_01_0002__fig1160410331975">Figure 1</a> and <a href="#er_01_0002__fig12604833873">Figure 2</a> show the networks with and without enterprise routers, respectively. <a href="#er_01_0002__table126045339718">Table 1</a> compares the two networks.<div class="fignone" id="er_01_0002__fig1160410331975"><a name="er_01_0002__fig1160410331975"></a><a name="fig1160410331975"></a><span class="figcap"><b>Figure 1 </b>A network without enterprise routers</span><br><span><img class="eddx" id="er_01_0002__image106048335712" src="en-us_image_0000001427301842.png"></span></div>
<div class="fignone" id="er_01_0002__fig12604833873"><a name="er_01_0002__fig12604833873"></a><a name="fig12604833873"></a><span class="figcap"><b>Figure 2 </b>A network with enterprise routers</span><br><span><img class="eddx" id="er_01_0002__image7604143310714" src="en-us_image_0000001559118632.png"></span></div>
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</table>
</div>
</div>
<p id="er_01_0002__p319861113315">The comparison shows that the network with enterprise routers is simpler and highly scalable and is also easier to maintain.</p>
<p id="er_01_0002__p319861113315">The comparison shows that the network with enterprise routers is simpler, more scalable, and easier to maintain.</p>
</div>
<div>
<div class="familylinks">

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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0004__table1550865410281" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Using enterprise routers in scenario 1</caption><tbody><tr id="er_01_0004__row1350835414280"><th class="firstcol" valign="top" width="15.2%" id="mcps1.3.2.3.2.3.1.1"><p id="er_01_0004__p750885417284">Customer Requirements</p>
</th>
<td class="cellrowborder" valign="top" width="84.8%" headers="mcps1.3.2.3.2.3.1.1 "><p id="er_01_0004__p1277120121287">Multiple service networks communicate or do not communicate with each other on the cloud but communicate with the on-premises data center. Suppose you require three VPCs for running the workloads on the public cloud, and the three VPCs (services A, B, and C) need to access public services in VPC 4 and your on-premises data center.</p>
<td class="cellrowborder" valign="top" width="84.8%" headers="mcps1.3.2.3.2.3.1.1 "><p id="er_01_0004__p1277120121287">Multiple service networks communicate or do not communicate with each other on the cloud but communicate with the on-premises data center. Suppose you require three VPCs for running services (Service A in VPC 1, Service B in VPC 2, and Service C in VPC 3) on <span id="er_01_0004__text207059259511">the public cloud</span>, and the three VPCs need to access public services in VPC 4 and your on-premises data center.</p>
</td>
</tr>
<tr id="er_01_0004__row11508254152816"><th class="firstcol" valign="top" width="15.2%" id="mcps1.3.2.3.2.3.2.1"><p id="er_01_0004__p450815543282">Pain Points</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0004__table057716178301" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Using enterprise routers in scenario 2</caption><tbody><tr id="er_01_0004__row195778172304"><th class="firstcol" valign="top" width="18%" id="mcps1.3.4.2.3.1.1"><p id="er_01_0004__p14577191753019">Customer Requirements</p>
</th>
<td class="cellrowborder" valign="top" width="82%" headers="mcps1.3.4.2.3.1.1 "><p id="er_01_0004__p8577817163014">Some services run on the public cloud and some in the on-premises data center. Two independent high-bandwidth Direct Connect connections are deployed between the public cloud and the data center to enable communication between them.</p>
<td class="cellrowborder" valign="top" width="82%" headers="mcps1.3.4.2.3.1.1 "><p id="er_01_0004__p8577817163014">Some services run on <span id="er_01_0004__text1133614484511">the public cloud</span> and some in the on-premises data center. Two independent high-bandwidth Direct Connect connections are deployed between the public cloud and the data center to enable communication between them.</p>
</td>
</tr>
<tr id="er_01_0004__row185771174303"><th class="firstcol" valign="top" width="18%" id="mcps1.3.4.2.3.2.1"><p id="er_01_0004__p95774177305">Pain Points</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0004__table3529521111019" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Using enterprise routers in scenario 3</caption><tbody><tr id="er_01_0004__row105291721161020"><th class="firstcol" valign="top" width="15.2%" id="mcps1.3.5.3.2.3.1.1"><p id="er_01_0004__p152972171013">Customer Requirements</p>
</th>
<td class="cellrowborder" valign="top" width="84.8%" headers="mcps1.3.5.3.2.3.1.1 "><p id="er_01_0004__p25292021101012">You are running workloads in your on-premises data center and on the public cloud. A single Direct Connect connection connects your on-premises data center to the cloud, which cannot ensure reliability.</p>
<td class="cellrowborder" valign="top" width="84.8%" headers="mcps1.3.5.3.2.3.1.1 "><p id="er_01_0004__p25292021101012">You are running workloads in your on-premises data center and on <span id="er_01_0004__text197613312065">the public cloud</span>. A single Direct Connect connection connects your on-premises data center to the cloud, which cannot ensure reliability.</p>
</td>
</tr>
<tr id="er_01_0004__row1152917215107"><th class="firstcol" valign="top" width="15.2%" id="mcps1.3.5.3.2.3.2.1"><p id="er_01_0004__p14529132131019">Pain Points</p>

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<tr id="er_01_0005__row1266416023014"><td class="cellrowborder" valign="top" width="16%" headers="mcps1.3.2.2.4.1.1 "><p id="er_01_0005__p19664405306">Attachments</p>
</td>
<td class="cellrowborder" valign="top" width="62%" headers="mcps1.3.2.2.4.1.2 "><p id="er_01_0005__p11851275416">You can attach network instances to the enterprise router.</p>
<div class="p" id="er_01_0005__p1345311719386">Network instances are attached to the enterprise router in different ways.<ul id="er_01_0005__ul34263440379"><li id="er_01_0005__li75401451154719">VPCs are attached to the enterprise router on the Enterprise Router console.</li><li id="er_01_0005__li1081572116435">Virtual gateways are attached through the Direct Connect console.</li><li id="er_01_0005__li146261629182015">VPN gateways are attached through the VPN console.</li></ul>
<div class="p" id="er_01_0005__p1345311719386">Network instances are attached to the enterprise router in different ways.<ul id="er_01_0005__ul34263440379"><li id="er_01_0005__li75401451154719">VPCs are attached to the enterprise router on the Enterprise Router console.</li><li id="er_01_0005__li1081572116435">Virtual gateways are attached through the Direct Connect console.</li><li id="er_01_0005__li146261629182015">VPN gateways are attached through the VPN console.</li><li id="er_01_0005__li10725929153111">CFW instances are created on the CFW console.</li></ul>
</div>
</td>
<td class="cellrowborder" valign="top" width="22%" headers="mcps1.3.2.2.4.1.3 "><p id="er_01_0005__p118482027121614"><a href="er_01_0019.html">Attachment Overview</a></p>
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</tr>
<tr id="er_01_0005__row11738185552410"><td class="cellrowborder" valign="top" width="16%" headers="mcps1.3.2.2.4.1.1 "><p id="er_01_0005__p137381455172412">Propagations</p>
</td>
<td class="cellrowborder" valign="top" width="62%" headers="mcps1.3.2.2.4.1.2 "><div class="p" id="er_01_0005__p97464442919">A propagation is created manually or automatically to enable an enterprise router to learn the routes to an associated attachment.<ul id="er_01_0005__ul1774184452917"><li id="er_01_0005__li197410445299">Manually: Select a route table and create a propagation for an attachment in the route table.</li><li id="er_01_0005__li12741144192913">Automatically: You just need to enable <strong id="er_01_0005__b37734811371">Default Route Table Propagation</strong> and specify the default route table. A propagation is automatically created for an attachment in the default propagation route table.</li></ul>
<td class="cellrowborder" valign="top" width="62%" headers="mcps1.3.2.2.4.1.2 "><div class="p" id="er_01_0005__p97464442919">A propagation is created manually or automatically to enable an enterprise router to learn the routes to an associated attachment.<ul id="er_01_0005__ul1774184452917"><li id="er_01_0005__li197410445299">Manually: You need to select a route table and create a propagation for an attachment in the route table.</li><li id="er_01_0005__li12741144192913">Automatically: You just need to enable <strong id="er_01_0005__b37734811371">Default Route Table Propagation</strong> and specify the default route table. A propagation is automatically created for an attachment in the default propagation route table.</li></ul>
</div>
</td>
<td class="cellrowborder" valign="top" width="22%" headers="mcps1.3.2.2.4.1.3 "><p id="er_01_0005__p892665611614"><a href="er_01_0035.html">Propagation Overview</a></p>
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<tr id="er_01_0005__row429619474568"><td class="cellrowborder" valign="top" width="16%" headers="mcps1.3.2.2.4.1.1 "><p id="er_01_0005__p1729694717562">Flow logs</p>
</td>
<td class="cellrowborder" valign="top" width="62%" headers="mcps1.3.2.2.4.1.2 "><p id="er_01_0005__p115211435163713">A flow log records traffic of attachments on enterprise routers in real time. The logs allow you to monitor the network traffic of attachments and analyze network attacks, improving the O&amp;M efficiency.</p>
<div class="p" id="er_01_0005__p89092664318">Flow logs can capture traffic of the following types of attachments:<ul id="er_01_0005__er_01_0108_ul960733916551"><li id="er_01_0005__er_01_0108_li954813791613">VPC</li><li id="er_01_0005__er_01_0108_li6607113918550">Virtual gateway</li></ul>
<div class="p" id="er_01_0005__p89092664318">Flow logs can capture traffic of the following types of attachments:<ul id="er_01_0005__er_01_0108_ul960733916551"><li id="er_01_0005__er_01_0108_li954813791613">VPC</li><li id="er_01_0005__er_01_0108_li6607113918550">Virtual gateway</li><li id="er_01_0005__er_01_0108_li277714193714">VPN gateway</li></ul>
</div>
</td>
<td class="cellrowborder" valign="top" width="22%" headers="mcps1.3.2.2.4.1.3 "><p id="er_01_0005__p92261021201716"><a href="er_01_0108.html">Flow Log Overview</a></p>
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</tr>
<tr id="er_01_0005__row105752452268"><td class="cellrowborder" valign="top" width="16%" headers="mcps1.3.2.2.4.1.1 "><p id="er_01_0005__p13575134518264">Tags</p>
</td>
<td class="cellrowborder" valign="top" width="62%" headers="mcps1.3.2.2.4.1.2 "><p id="er_01_0005__p45756451268">Tags are used to identify cloud resources. You can add tags to enterprise routers and route tables.</p>
<td class="cellrowborder" valign="top" width="62%" headers="mcps1.3.2.2.4.1.2 "><p id="er_01_0005__p45756451268">Tags are used to identify cloud resources. You can add tags to enterprise routers, route tables, and other resources.</p>
</td>
<td class="cellrowborder" valign="top" width="22%" headers="mcps1.3.2.2.4.1.3 "><p id="er_01_0005__p134414720188"><a href="er_01_0049.html">Overview</a></p>
</td>

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</table>
</div>
</div>
<div class="section" id="er_01_0006__section21001422155310"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0006__ul1154735615222"><li id="er_01_0006__li4696181619286">Enterprise routers cannot be used together with virtual IP addresses of VPCs. If virtual IP addresses are used, contact customer service.</li><li id="er_01_0006__li1859293215119">Traffic cannot be forwarded from a VPC to the enterprise router that the VPC is attached to if you set the destination of a route whose next hop is the enterprise router to 0.0.0.0/0 in the VPC route table and if:<ul id="er_01_0006__ul72041734210"><li id="er_01_0006__er_01_0129_li17652438103917">An ECS in the VPC has an EIP bound.</li><li id="er_01_0006__er_01_0129_li0652153843918">The VPC is being used by ELB, NAT Gateway, VPC Endpoint, or Distributed Cache Service (DCS).</li></ul>
<div class="section" id="er_01_0006__section21001422155310"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0006__ul1154735615222"><li id="er_01_0006__li4696181619286">Enterprise routers cannot be used together with virtual IP addresses of VPCs. If virtual IP addresses are used, contact customer service.</li><li id="er_01_0006__li1859293215119">Traffic cannot be forwarded from a VPC to its attached enterprise router if the destination of a route with an enterprise router as the next hop is set to 0.0.0.0/0 in the VPC route table and if:<ul id="er_01_0006__ul72041734210"><li id="er_01_0006__er_01_0129_li17652438103917">An ECS in the VPC has an EIP bound.</li><li id="er_01_0006__er_01_0129_li0652153843918">The VPC is being used by ELB, NAT Gateway, VPC Endpoint, or Distributed Cache Service (DCS).</li></ul>
<p id="er_01_0006__p134412484281">To solve this problem, refer to <a href="er_01_0121.html">Why Traffic Can't Be Forwarded from a VPC with a Route Destination of 0.0.0.0/0 to Its Enterprise Router?</a></p>
</li><li id="er_01_0006__li16793411597">The VPC route table does not allow you to add a route whose destination address is 100.64.x.x and next hop is an enterprise router.<p id="er_01_0006__p4852161231010"><a name="er_01_0006__li16793411597"></a><a name="li16793411597"></a>To solve this problem, refer to <a href="er_01_0122.html">How Do I Route Traffic to 100.64.x.x Through an Enterprise Router?</a></p>
</li></ul>

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<a name="er_01_0008"></a><a name="er_01_0008"></a>
<h1 class="topictitle1">Permissions</h1>
<div id="body0000001135277764"><p id="er_01_0008__p7808122016303">If you need to assign different permissions to employees in your enterprise to control their access to your cloud resources, you can use the Identity and Access Management (IAM) for fine-grained permissions management. IAM provides functions such as identity authentication, permissions management, and access control.</p>
<div id="body0000001135277764"><p id="er_01_0008__p7808122016303">If you need to assign different permissions to employees in your enterprise to control their access to your cloud resources, you can use Identity and Access Management (IAM) for fine-grained permissions management. IAM provides functions such as identity authentication, permissions management, and access control.</p>
<p id="er_01_0008__p57386149361">On the IAM console, you can create IAM users and assign permissions to control their access to specific resources. For example, you can create IAM users for software developers and assign permissions to allow them to use enterprise router resources but disallow them from performing any high-risk operations such as deleting such resources.</p>
<p id="er_01_0008__p10590121414461">IAM is free of charge.</p>
<p id="er_01_0008__p8443162610188">For more information, see <a href="https://docs.otc.t-systems.com/identity-access-management/umn/service_overview/what_is_iam.html#iam-01-0026" target="_blank" rel="noopener noreferrer">IAM Service Overview</a>.</p>

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<td class="cellrowborder" valign="top" width="59.17%" headers="mcps1.3.1.2.3.1.2 "><p id="er_01_0009__p77301419192917">You can attach a VPN gateway to an enterprise router to connect VPCs to an on-premises data center through a shared VPN connection.</p>
</td>
</tr>
<tr id="er_01_0009__row770184315440"><td class="cellrowborder" valign="top" width="40.83%" headers="mcps1.3.1.2.3.1.1 "><p id="er_01_0009__p07013439442">Cloud Firewall (CFW)</p>
</td>
<td class="cellrowborder" valign="top" width="59.17%" headers="mcps1.3.1.2.3.1.2 "><p id="er_01_0009__p1170943144419">You can use CFW to protect traffic between VPCs.</p>
</td>
</tr>
<tr id="er_01_0009__row157628361248"><td class="cellrowborder" valign="top" width="40.83%" headers="mcps1.3.1.2.3.1.1 "><p id="er_01_0009__p10762203610411">Identity and Access Management (IAM)</p>
</td>
<td class="cellrowborder" valign="top" width="59.17%" headers="mcps1.3.1.2.3.1.2 "><p id="er_01_0009__p889720562242">You can use IAM to assign different permissions to different users to control their access to enterprise router resources.</p>

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<h1 class="topictitle1">How Enterprise Routers Work</h1>
<div id="body0000001181135395"><p id="er_01_0011__p3463123143319">You can attach your network connections to an enterprise router to quickly construct diversified networks and meet various service requirements. <a href="#er_01_0011__fig6579195613359">Figure 1</a> shows the process of using an enterprise router, including creating an enterprise router, adding attachments to the enterprise router, and configure routes.</p>
<div class="p" id="er_01_0011__p38772262216">Enterprise routers support the following attachments:<ul id="er_01_0011__ul15214385212"><li id="er_01_0011__li20521163815216"><strong id="er_01_0011__b12731114154810">VPC attachment</strong>: Attach a VPC from the same region as that of an enterprise router.</li><li id="er_01_0011__li1920784732113"><strong id="er_01_0011__b8891777499">Virtual gateway attachment</strong>: Attach a Direct Connect virtual gateway from the same region as that of an enterprise router.</li><li id="er_01_0011__li250594132211"><strong id="er_01_0011__b7716181312508">VPN gateway attachment</strong>: Attach a VPN gateway from the same region as that of an enterprise router.</li></ul>
<div class="p" id="er_01_0011__p38772262216">Enterprise routers support the following attachments:<ul id="er_01_0011__ul15214385212"><li id="er_01_0011__li20521163815216"><strong id="er_01_0011__b12731114154810">VPC attachment</strong>: Attach a VPC from the same region as that of an enterprise router.</li><li id="er_01_0011__li1920784732113"><strong id="er_01_0011__b8891777499">Virtual gateway attachment</strong>: Attach a Direct Connect virtual gateway from the same region as that of an enterprise router.</li><li id="er_01_0011__li250594132211"><strong id="er_01_0011__b7716181312508">VPN gateway attachment</strong>: Attach a VPN gateway from the same region as that of an enterprise router.</li><li id="er_01_0011__li76926104112"><strong id="er_01_0011__b1432095315413">CFW instance attachment</strong>: Connect an enterprise router to the VPC border firewall in the same region.</li></ul>
</div>
<div class="fignone" id="er_01_0011__fig6579195613359"><a name="er_01_0011__fig6579195613359"></a><a name="fig6579195613359"></a><span class="figcap"><b>Figure 1 </b>Processing of using an enterprise router</span><br><span><img class="eddx" id="er_01_0011__image65796564355" src="en-us_image_0000001586175602.png"></span></div>
<p id="er_01_0011__p1540261920214"><a href="#er_01_0011__fig1050492818281">Figure 2</a> shows how an enterprise router works. <a href="#er_01_0011__table133841251278">Table 2</a> describes the traffic flows in detail if an enterprise router is used for networking.</p>
@ -52,7 +52,7 @@
<td class="cellrowborder" valign="top" width="24.002400240024002%" headers="mcps1.3.7.2.4.1.2 "><p id="er_01_0011__p83849256715">Add <a href="#er_01_0011__section692619383113">attachments</a> to the enterprise router.</p>
</td>
<td class="cellrowborder" valign="top" width="68.55685568556855%" headers="mcps1.3.7.2.4.1.3 "><p id="er_01_0011__p238482512718">Attach network instances to enterprise router 1 in region A.</p>
<div class="p" id="er_01_0011__p1417281718913">Network instances from the same region<ul id="er_01_0011__ul33841625474"><li id="er_01_0011__li2038414251371"><strong id="er_01_0011__b1050595542">VPC attachments</strong>: VPC 1, VPC 2, and VPC 3</li><li id="er_01_0011__li1138416256719"><strong id="er_01_0011__b473130360">Virtual gateway attachment</strong>: Virtual gateway</li><li id="er_01_0011__li138462510718"><strong id="er_01_0011__b71109484259">VPN gateway attachment</strong>: VPN gateway</li></ul>
<div class="p" id="er_01_0011__p1417281718913">Network instances from the same region<ul id="er_01_0011__ul33841625474"><li id="er_01_0011__li2038414251371"><strong id="er_01_0011__b1045822303">VPC attachments</strong>: VPC 1, VPC 2, and VPC 3</li><li id="er_01_0011__li1138416256719"><strong id="er_01_0011__b887769686">Virtual gateway attachment</strong>: Virtual gateway</li><li id="er_01_0011__li138462510718"><strong id="er_01_0011__b71109484259">VPN gateway attachment</strong>: VPN gateway</li></ul>
</div>
</td>
</tr>
@ -91,6 +91,11 @@
<td class="cellrowborder" valign="top" width="74%" headers="mcps1.3.8.3.2.3.1.2 "><p id="er_01_0011__p12642732171619">VPN gateway</p>
</td>
</tr>
<tr id="er_01_0011__row855012712122"><td class="cellrowborder" valign="top" width="26%" headers="mcps1.3.8.3.2.3.1.1 "><p id="er_01_0011__p1155012714127">CFW instance attachment</p>
</td>
<td class="cellrowborder" valign="top" width="74%" headers="mcps1.3.8.3.2.3.1.2 "><p id="er_01_0011__p1555017713124">VPC border firewall</p>
</td>
</tr>
</tbody>
</table>
</div>
@ -142,6 +147,11 @@
<td class="cellrowborder" valign="top" width="59%" headers="mcps1.3.10.3.2.2.3.1.2 "><p id="er_01_0011__p13791163916174">Supported</p>
</td>
</tr>
<tr id="er_01_0011__row5950174591211"><td class="cellrowborder" valign="top" width="41%" headers="mcps1.3.10.3.2.2.3.1.1 "><p id="er_01_0011__p811495617133">CFW instance</p>
</td>
<td class="cellrowborder" valign="top" width="59%" headers="mcps1.3.10.3.2.2.3.1.2 "><p id="er_01_0011__p55676206208">Not supported</p>
</td>
</tr>
</tbody>
</table>
</div>
@ -151,7 +161,7 @@
<div class="p" id="er_01_0011__p7745449298">For VPC attachments, their CIDR blocks are propagated to the enterprise router. For other attachments, all routes are propagated to the enterprise router. For details, see <a href="#er_01_0011__table18744443292">Table 6</a>.
<div class="tablenoborder"><a name="er_01_0011__table18744443292"></a><a name="table18744443292"></a><table cellpadding="4" cellspacing="0" summary="" id="er_01_0011__table18744443292" frame="border" border="1" rules="all"><caption><b>Table 6 </b>Propagation</caption><thead align="left"><tr id="er_01_0011__row4741944102920"><th align="left" class="cellrowborder" valign="top" width="41%" id="mcps1.3.11.3.2.2.3.1.1"><p id="er_01_0011__p67484482918">Attachment Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="59%" id="mcps1.3.11.3.2.2.3.1.2"><p id="er_01_0011__p274194422918">Propagated Routes to Enterprise Router</p>
<th align="left" class="cellrowborder" valign="top" width="59%" id="mcps1.3.11.3.2.2.3.1.2"><p id="er_01_0011__p274194422918">Propagated Info</p>
</th>
</tr>
</thead>
@ -170,6 +180,11 @@
<td class="cellrowborder" valign="top" width="59%" headers="mcps1.3.11.3.2.2.3.1.2 "><p id="er_01_0011__p14709201831911">All routes</p>
</td>
</tr>
<tr id="er_01_0011__row934211311207"><td class="cellrowborder" valign="top" width="41%" headers="mcps1.3.11.3.2.2.3.1.1 "><p id="er_01_0011__p625913315209">CFW instance</p>
</td>
<td class="cellrowborder" valign="top" width="59%" headers="mcps1.3.11.3.2.2.3.1.2 "><p id="er_01_0011__p10259233162020">CIDR blocks of the VPCs protected by CFW</p>
</td>
</tr>
</tbody>
</table>
</div>
@ -189,14 +204,14 @@
</td>
<td class="cellrowborder" valign="top" width="52.019999999999996%" headers="mcps1.3.12.3.2.4.1.2 "><p id="er_01_0011__p8326142213212">Propagated routes are automatically learned through propagation and cannot be modified or deleted.</p>
</td>
<td class="cellrowborder" valign="top" width="25.95%" headers="mcps1.3.12.3.2.4.1.3 "><ul id="er_01_0011__ul14669202518411"><li id="er_01_0011__li166912544117">VPC</li><li id="er_01_0011__li16669122519416">Virtual gateway</li><li id="er_01_0011__li10965183313192">VPN gateway</li></ul>
<td class="cellrowborder" valign="top" width="25.95%" headers="mcps1.3.12.3.2.4.1.3 "><ul id="er_01_0011__ul14669202518411"><li id="er_01_0011__li166912544117">VPC</li><li id="er_01_0011__li16669122519416">Virtual gateway</li><li id="er_01_0011__li10965183313192">VPN gateway</li><li id="er_01_0011__li624819502218">CFW instance</li></ul>
</td>
</tr>
<tr id="er_01_0011__row532682233219"><td class="cellrowborder" valign="top" width="22.03%" headers="mcps1.3.12.3.2.4.1.1 "><p id="er_01_0011__p1542183514501">Static routes</p>
</td>
<td class="cellrowborder" valign="top" width="52.019999999999996%" headers="mcps1.3.12.3.2.4.1.2 "><p id="er_01_0011__p179198330483">Static routes are manually created and can be modified or deleted.</p>
</td>
<td class="cellrowborder" valign="top" width="25.95%" headers="mcps1.3.12.3.2.4.1.3 "><ul id="er_01_0011__ul1531474024113"><li id="er_01_0011__li11314184024115">VPC</li></ul>
<td class="cellrowborder" valign="top" width="25.95%" headers="mcps1.3.12.3.2.4.1.3 "><ul id="er_01_0011__ul1531474024113"><li id="er_01_0011__li11314184024115">VPC</li><li id="er_01_0011__li684117319223">CFW instance</li></ul>
</td>
</tr>
</tbody>

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<a name="er_01_0013"></a><a name="er_01_0013"></a>
<h1 class="topictitle1">Modifying an Enterprise Router</h1>
<div id="body0000001135381496"><div class="section" id="er_01_0013__section1631373542615"><h4 class="sectiontitle">Scenarios</h4><div class="p" id="er_01_0013__p157813402267">This section describes how to modify settings of an enterprise router. You can:<ul id="er_01_0013__ul122436713349"><li id="er_01_0013__li224316714343">Modify the name of an enterprise router.</li><li id="er_01_0013__li2024357203419">Enable or disable <strong id="er_01_0013__b2081619186483">Default Route Table Association</strong>.</li><li id="er_01_0013__li14243107123418">Enable or disable <strong id="er_01_0013__b125192794820">Default Route Table Propagation</strong>.</li></ul>
<div id="body0000001135381496"><div class="section" id="er_01_0013__section1631373542615"><h4 class="sectiontitle">Scenarios</h4><div class="p" id="er_01_0013__p157813402267">This section describes how to modify settings of an enterprise router. You can:<ul id="er_01_0013__ul122436713349"><li id="er_01_0013__li224316714343">Modify the name of an enterprise router.</li><li id="er_01_0013__li2024357203419">Enable or disable <strong id="er_01_0013__b2081619186483">Default Route Table Association</strong>.</li><li id="er_01_0013__li14243107123418">Enable or disable <strong id="er_01_0013__b125192794820">Default Route Table Propagation</strong>.</li><li id="er_01_0013__li77618124587">Enable or disable <span class="parmname" id="er_01_0013__parmname4269184512515"><b>Auto Accept Shared Attachments</b></span>.</li></ul>
</div>
</div>
<div class="section" id="er_01_0013__section2337171820346"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0013__ol5288104816346"><li id="er_01_0013__li18723650155117"><span>Log in to the management console.</span></li><li id="er_01_0013__li18272154101917"><span>Click <span><img id="er_01_0013__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0013__li13278035192013"><span>Click <strong id="er_01_0013__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0013__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0013__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0013__er_01_0064_p131231735172115">The <strong id="er_01_0013__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
@ -29,7 +29,7 @@
<tr id="er_01_0013__row14429124613579"><td class="cellrowborder" valign="top" width="17.901790179017905%" headers="mcps1.3.2.2.6.2.1.2.4.1.1 "><p id="er_01_0013__p1942934613577">Default Route Table Association</p>
</td>
<td class="cellrowborder" valign="top" width="59.615961596159615%" headers="mcps1.3.2.2.6.2.1.2.4.1.2 "><p id="er_01_0013__p19654121183520">Optional</p>
<div class="p" id="er_01_0013__p863415413197">Enabling <strong id="er_01_0013__b791553212485">Default Route Table Association</strong> can simplify network configurations. After this function is enabled:<ol type="a" id="er_01_0013__ol1995642711204"><li id="er_01_0013__li013533610204">Select a route table for <strong id="er_01_0013__b490983224311">Default Association Route Table</strong>.</li><li id="er_01_0013__li4566111219217">If you create an attachment to this enterprise router, the attachment will be automatically associated with the default association route table.</li></ol>
<div class="p" id="er_01_0013__p863415413197">Enabling <strong id="er_01_0013__b791553212485">Default Route Table Association</strong> can simplify network configurations. After this function is enabled:<ol type="a" id="er_01_0013__ol1995642711204"><li id="er_01_0013__li013533610204">Select a route table for <strong id="er_01_0013__b490983224311">Association Route Table</strong>.</li><li id="er_01_0013__li4566111219217">If you create an attachment to this enterprise router, the attachment will be automatically associated with the default association route table.</li></ol>
</div>
</td>
<td class="cellrowborder" valign="top" width="22.482248224822484%" headers="mcps1.3.2.2.6.2.1.2.4.1.3 "><p id="er_01_0013__p242944613574">Enable</p>
@ -49,7 +49,7 @@
</td>
<td class="cellrowborder" valign="top" width="59.615961596159615%" headers="mcps1.3.2.2.6.2.1.2.4.1.2 "><p id="er_01_0013__p16200826153510">Optional</p>
<p id="er_01_0013__p2890557102215">Enabling <strong id="er_01_0013__b8737131374910">Default Route Table Propagation</strong> can simplify network configurations. After this function is enabled:</p>
<ol type="a" id="er_01_0013__ol2414128101612"><li id="er_01_0013__li1884583061611">Select a route table for <strong id="er_01_0013__b13936103174819">Association Route Table</strong>.</li><li id="er_01_0013__li1641519815167">If you create an attachment to this enterprise router, the attachment will be automatically propagated to the default propagation route table.</li></ol>
<ol type="a" id="er_01_0013__ol2414128101612"><li id="er_01_0013__li1884583061611">Select a route table for <strong id="er_01_0013__b13936103174819">Propagation Route Table</strong>.</li><li id="er_01_0013__li1641519815167">If you create an attachment to this enterprise router, the attachment will be automatically propagated to the default propagation route table.</li></ol>
</td>
<td class="cellrowborder" valign="top" width="22.482248224822484%" headers="mcps1.3.2.2.6.2.1.2.4.1.3 "><p id="er_01_0013__p15431746165712">Enable</p>
</td>

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<h1 class="topictitle1">Deleting an Enterprise Router</h1>
<div id="body0000001181500813"><div class="section" id="er_01_0017__section1631373542615"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0017__p157813402267">Delete an enterprise router that is no longer needed.</p>
</div>
<div class="section" id="er_01_0017__section1136663124119"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0017__ul437410101411"><li id="er_01_0017__li97197540254">An enterprise router that has attachments cannot be deleted. Delete the attachments first. For details, see <a href="er_01_0019.html">Attachment Overview</a>.</li><li id="er_01_0017__li6446124411415">An enterprise router that has route tables can be deleted directly.</li><li id="er_01_0017__li1637172784517">An enterprise router that is shared with other accounts can be deleted directly.</li><li id="er_01_0017__li1437132102711">Deleting an enterprise router will also delete all of its flow logs.</li></ul>
<div class="section" id="er_01_0017__section1136663124119"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0017__ul437410101411"><li id="er_01_0017__li97197540254">An enterprise router that has attachments cannot be deleted. Delete the attachments first. For details, see <a href="er_01_0019.html">Attachment Overview</a>.</li><li id="er_01_0017__li6446124411415">An enterprise router that has route tables can be deleted directly.</li><li id="er_01_0017__li1637172784517">An enterprise router that is shared with other accounts can be deleted directly.</li><li id="er_01_0017__li1437132102711">Deleting an enterprise router will also delete all of its flow logs.</li></ul>
</div>
<div class="section" id="er_01_0017__section1776015016613"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0017__ol5288104816346"><li id="er_01_0017__li1233111618521"><span>Log in to the management console.</span></li><li id="er_01_0017__li18272154101917"><span>Click <span><img id="er_01_0017__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0017__li13278035192013"><span>Click <strong id="er_01_0017__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0017__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0017__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0017__er_01_0064_p131231735172115">The <strong id="er_01_0017__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0017__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0017__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0017__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>

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</li>
<li class="ulchildlink"><strong><a href="er_01_0170.html">VPN Gateway Attachments</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="er_01_0093.html">Changing the Name of an Attachment</a></strong><br>
<li class="ulchildlink"><strong><a href="er_01_0178.html">CFW Instance Attachments</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="er_01_0093.html">Modifying the Basic Information of an Attachment</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="er_01_0021.html">Viewing an Attachment</a></strong><br>
</li>

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</th>
<th align="left" class="cellrowborder" valign="top" width="23.28%" id="mcps1.3.1.2.2.6.1.2"><p id="er_01_0019__p11704313187">Network Instance</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="28.84%" id="mcps1.3.1.2.2.6.1.3"><p id="er_01_0019__p71709318186">Create Attachment</p>
<th align="left" class="cellrowborder" valign="top" width="28.84%" id="mcps1.3.1.2.2.6.1.3"><p id="er_01_0019__p71709318186">Creating Attachments</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="13.26%" id="mcps1.3.1.2.2.6.1.4"><p id="er_01_0019__p117014316181">View Attachment</p>
<th align="left" class="cellrowborder" valign="top" width="13.26%" id="mcps1.3.1.2.2.6.1.4"><p id="er_01_0019__p117014316181">Viewing Attachments</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="18%" id="mcps1.3.1.2.2.6.1.5"><p id="er_01_0019__p61707317186">Delete Attachment</p>
<th align="left" class="cellrowborder" valign="top" width="18%" id="mcps1.3.1.2.2.6.1.5"><p id="er_01_0019__p61707317186">Deleting Attachments</p>
</th>
</tr>
</thead>
@ -48,6 +48,17 @@
<td class="cellrowborder" valign="top" width="18%" headers="mcps1.3.1.2.2.6.1.5 "><p id="er_01_0019__p1568219411194"><a href="er_01_0114.html">Deleting a VPN Gateway Attachment</a></p>
</td>
</tr>
<tr id="er_01_0019__row6120821114619"><td class="cellrowborder" valign="top" width="16.619999999999997%" headers="mcps1.3.1.2.2.6.1.1 "><p id="er_01_0019__p21934235462">Cloud Firewall (CFW)</p>
</td>
<td class="cellrowborder" valign="top" width="23.28%" headers="mcps1.3.1.2.2.6.1.2 "><p id="er_01_0019__p1019352313468">CFW instance</p>
</td>
<td class="cellrowborder" valign="top" width="28.84%" headers="mcps1.3.1.2.2.6.1.3 "><p id="er_01_0019__p10193023204611"><a href="er_01_0179.html">Creating a CFW Instance Attachment</a></p>
</td>
<td class="cellrowborder" valign="top" width="13.26%" headers="mcps1.3.1.2.2.6.1.4 "><p id="er_01_0019__p519392364614"><a href="er_01_0021.html">Viewing an Attachment</a></p>
</td>
<td class="cellrowborder" valign="top" width="18%" headers="mcps1.3.1.2.2.6.1.5 "><p id="er_01_0019__p61931823194613"><a href="er_01_0180.html">Deleting a CFW Instance Attachment</a></p>
</td>
</tr>
</tbody>
</table>
</div>

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</p></li><li id="er_01_0021__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0021__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0021__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>
</p></li><li id="er_01_0021__li25751958135516"><span>Go to the <strong id="er_01_0021__b540913173313">Attachments</strong> tab using either of the following methods:</span><p><ul id="er_01_0021__ul1991183111311"><li id="er_01_0021__li14916391316">In the upper right corner of the enterprise router, click <strong id="er_01_0021__b7239025634">Manage Attachment</strong>.</li><li id="er_01_0021__li791113151319">Click the enterprise router name and click <span class="wintitle" id="er_01_0021__wintitle3590426737"><b>Attachments</b></span>.</li></ul>
<div class="fignone" id="er_01_0021__fig663217269215"><span class="figcap"><b>Figure 2 </b>Viewing attachments</span><br><span><img id="er_01_0021__image112613331690" src="en-us_image_0000001675151210.png"></span></div>
</p></li><li id="er_01_0021__li93221423359"><span>On the <strong id="er_01_0021__b540913373403">Attachments</strong> tab, you can view:</span><p><ul id="er_01_0021__ul215710344517"><li id="er_01_0021__li46135418516">In the attachment list, you can view information such as the name, status, type, and attached resource.</li><li id="er_01_0021__li111571234955">If you click the attachment name, you can view more information about the attachment on the displayed page, including the attachment ID, creation time, and tags.</li><li id="er_01_0021__li17281414571">If you click the attached resource, you will go to the details page of the attached resource.</li></ul>
<div class="fignone" id="er_01_0021__fig678995018228"><span class="figcap"><b>Figure 3 </b>Viewing attachment details (virtual gateway attachment)</span><br><span><img id="er_01_0021__image154171811162319" src="en-us_image_0000001675117976.png"></span></div>
<div class="fignone" id="er_01_0021__fig12242759204217"><span class="figcap"><b>Figure 4 </b>Viewing attachment details (VPN gateway attachment)</span><br><span><img id="er_01_0021__image1361018519420" src="en-us_image_0000001988259322.png"></span></div>
</p></li><li id="er_01_0021__li93221423359"><span>On the <strong id="er_01_0021__b540913373403">Attachments</strong> tab, you can view:</span><p><ul id="er_01_0021__ul215710344517"><li id="er_01_0021__li46135418516">In the attachment list, you can view information such as the name, status, type, and attached resource.</li><li id="er_01_0021__li111571234955">If you click the attachment name, you can view more information about the attachment on the displayed page, such as <strong id="er_01_0021__b204164122412">ID</strong>, <strong id="er_01_0021__b683216202244">Created</strong>, and tags.</li><li id="er_01_0021__li17281414571">If you click the attached resource, you will go to the details page of the attached resource.</li></ul>
<div class="fignone" id="er_01_0021__fig568013571760"><span class="figcap"><b>Figure 3 </b>Viewing attachment details (VPC attachment)</span><br><span><img id="er_01_0021__image145309491614" src="en-us_image_0000002188732464.png"></span></div>
<div class="fignone" id="er_01_0021__fig678995018228"><span class="figcap"><b>Figure 4 </b>Viewing attachment details (virtual gateway attachment)</span><br><span><img id="er_01_0021__image154171811162319" src="en-us_image_0000001675117976.png"></span></div>
<div class="fignone" id="er_01_0021__fig12242759204217"><span class="figcap"><b>Figure 5 </b>Viewing attachment details (VPN gateway attachment)</span><br><span><img id="er_01_0021__image1361018519420" src="en-us_image_0000001988259322.png"></span></div>
<div class="fignone" id="er_01_0021__fig14772141185114"><span class="figcap"><b>Figure 6 </b>Viewing attachment details (CFW instance attachment)</span><br><span><img id="er_01_0021__image672975010518" src="en-us_image_0000002245988513.png"></span></div>
</p></li></ol>
</div>
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<a name="er_01_0022"></a><a name="er_01_0022"></a>
<h1 class="topictitle1">Monitoring and Auditing</h1>
<div id="body0000002067713285"><p id="er_01_0022__p8060118"></p>
<h1 class="topictitle1">Monitoring and Audit</h1>
<div id="body0000002067713285"><p id="er_01_0022__p8060118"></p>
</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="er_01_0102.html">Cloud Eye Monitoring</a></strong><br>

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<td class="cellrowborder" valign="top" width="22.21222122212221%" headers="mcps1.3.2.2.7.2.1.2.4.1.3 "><p id="er_01_0025__p5570185535117">er-rtb-01</p>
</td>
</tr>
<tr id="er_01_0025__row9114149307"><td class="cellrowborder" valign="top" width="17.711771177117715%" headers="mcps1.3.2.2.7.2.1.2.4.1.1 "><p id="er_01_0025__p1331617105328">Description</p>
</td>
<td class="cellrowborder" valign="top" width="60.07600760076007%" headers="mcps1.3.2.2.7.2.1.2.4.1.2 "><p id="er_01_0025__p231681016328">Optional</p>
<p id="er_01_0025__p158363033212">Describe the route table for easy identification.</p>
</td>
<td class="cellrowborder" valign="top" width="22.21222122212221%" headers="mcps1.3.2.2.7.2.1.2.4.1.3 "><p id="er_01_0025__p10316171013220">-</p>
</td>
</tr>
<tr id="er_01_0025__row23296255266"><td class="cellrowborder" valign="top" width="17.711771177117715%" headers="mcps1.3.2.2.7.2.1.2.4.1.1 "><p id="er_01_0025__p1227884725111">Tag</p>
</td>
<td class="cellrowborder" valign="top" width="60.07600760076007%" headers="mcps1.3.2.2.7.2.1.2.4.1.2 "><p id="er_01_0025__p1727834711518">Optional</p>
@ -44,6 +36,14 @@
<p id="er_01_0025__p19427720193313"><strong id="er_01_0025__b882322654019">Tag value</strong>: 01</p>
</td>
</tr>
<tr id="er_01_0025__row121266596406"><td class="cellrowborder" valign="top" width="17.711771177117715%" headers="mcps1.3.2.2.7.2.1.2.4.1.1 "><p id="er_01_0025__p56511613144114">Description</p>
</td>
<td class="cellrowborder" valign="top" width="60.07600760076007%" headers="mcps1.3.2.2.7.2.1.2.4.1.2 "><p id="er_01_0025__p7651101314119">Optional</p>
<p id="er_01_0025__p166511613104112">Describe the route table for easy identification.</p>
</td>
<td class="cellrowborder" valign="top" width="22.21222122212221%" headers="mcps1.3.2.2.7.2.1.2.4.1.3 "><p id="er_01_0025__p12651513114115">-</p>
</td>
</tr>
</tbody>
</table>
</div>

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<h1 class="topictitle1">Modifying a Route Table</h1>
<div id="body0000001135503058"><div class="section" id="er_01_0026__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0026__p8734113614438">This section describes how to modify the name and description of a route table.</p>
</div>
<div class="section" id="er_01_0026__section639214475113"><h4 class="sectiontitle">Notes and Constraints</h4><p id="er_01_0026__p176952805116">Only the name and description of route tables named <strong id="er_01_0026__b1218439602">defaultRouteTable</strong> and custom route tables can be changed.</p>
<div class="section" id="er_01_0026__section639214475113"><h4 class="sectiontitle">Constraints</h4><p id="er_01_0026__p176952805116">Only the name and description of route tables named <strong id="er_01_0026__b1218439602">defaultRouteTable</strong> and custom route tables can be changed.</p>
</div>
<div class="section" id="er_01_0026__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0026__ol11464202427"><li id="er_01_0026__li21451544125219"><span>Log in to the management console.</span></li><li id="er_01_0026__li18272154101917"><span>Click <span><img id="er_01_0026__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0026__li13278035192013"><span>Click <strong id="er_01_0026__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0026__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0026__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0026__er_01_0064_p131231735172115">The <strong id="er_01_0026__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0026__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0026__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0026__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>

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<h1 class="topictitle1">Deleting a Route Table</h1>
<div id="body0000001181302665"><div class="section" id="er_01_0028__section1631373542615"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0028__p49638505020">Delete an enterprise router route table that is no longer needed.</p>
</div>
<div class="section" id="er_01_0028__section1136663124119"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0028__ul59951969191"><li id="er_01_0028__li17995106191919">If a route table is used as the default association route table and/or default propagation route table, the route table cannot be deleted.<ul id="er_01_0028__ul3864750132118"><li id="er_01_0028__li11563855172017">If <strong id="er_01_0028__b169921541142112">Default Route Association</strong> is set to <strong id="er_01_0028__b1367914512118">Yes</strong> on the basic information page of the route table, the route table is used as the default association route table.</li><li id="er_01_0028__li18409151514213">Also, if <strong id="er_01_0028__b6310181510225">Default Route Propagation</strong> is set to <strong id="er_01_0028__b173111815112210">Yes</strong> on the basic information of the route table, the route table is used as the default propagation route table.</li></ul>
<div class="section" id="er_01_0028__section1136663124119"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0028__ul59951969191"><li id="er_01_0028__li17995106191919">If a route table is used as the default association route table and/or default propagation route table, the route table cannot be deleted.<ul id="er_01_0028__ul3864750132118"><li id="er_01_0028__li11563855172017">If <strong id="er_01_0028__b169921541142112">Default Route Association</strong> is set to <strong id="er_01_0028__b1367914512118">Yes</strong> on the basic information page of the route table, the route table is used as the default association route table.</li><li id="er_01_0028__li18409151514213">Also, if <strong id="er_01_0028__b6310181510225">Default Route Propagation</strong> is set to <strong id="er_01_0028__b173111815112210">Yes</strong> on the basic information of the route table, the route table is used as the default propagation route table.</li></ul>
<p id="er_01_0028__p1976513198529">To delete such a route table, change <strong id="er_01_0028__b19671443133013">Default Route Association</strong> and <strong id="er_01_0028__b77591754133016">Default Route Propagation</strong> settings. For details, see <a href="er_01_0013.html">Modifying an Enterprise Router</a>.</p>
</li><li id="er_01_0028__li1338001992316">A route table cannot be deleted if it contains an association or a propagation. You need to delete the association and propagation before deleting this route table.<ul id="er_01_0028__ul14353813244"><li id="er_01_0028__li1146164414236">For details about how to delete an association, see <a href="er_01_0033.html">Deleting an Association from a Route Table</a>.</li><li id="er_01_0028__li239795172317">For details about how to delete a propagation, see <a href="er_01_0038.html">Deleting a Propagation from a Route Table</a>.</li></ul>
</li><li id="er_01_0028__li1982433202510">A route table can be deleted if it contains only static routes. Ensure that the routes are no longer required before deleting their route table.</li></ul>
@ -13,7 +13,7 @@
</p></li><li id="er_01_0028__li0741103613548"><span>Go to the <strong id="er_01_0028__b9385162033811">Route Tables</strong> tab using either of the following methods:</span><p><ul id="er_01_0028__ul1991183111311"><li id="er_01_0028__li14916391316">In the upper right corner of the enterprise router, click <strong id="er_01_0028__b867413255383">Manage Route Table</strong>.</li><li id="er_01_0028__li791113151319">Click the enterprise router name and click <span class="wintitle" id="er_01_0028__wintitle55313262384"><b>Route Tables</b></span>.</li></ul>
<div class="fignone" id="er_01_0028__fig251310018267"><span class="figcap"><b>Figure 2 </b>Deleting a route table</span><br><span><img id="er_01_0028__image188114717265" src="en-us_image_0000001675120256.png"></span></div>
</p></li><li id="er_01_0028__li25751958135516"><span>In the route table list, click <span><img id="er_01_0028__image1371610331307" src="en-us_image_0000001142144144.png"></span> next to the name of the target route table.</span><p><p id="er_01_0028__p756375085812">A confirmation dialog box is displayed.</p>
</p></li><li id="er_01_0028__li11650812496"><span>Click <strong id="er_01_0028__b1447897124012">Yes</strong>.</span><p><p id="er_01_0028__p1565011211912">A deleted route table cannot be recovered.</p>
</p></li><li id="er_01_0028__li11650812496"><span>Confirm the information and click <strong id="er_01_0028__b976245217285">Yes</strong>.</span><p><p id="er_01_0028__p1565011211912">A deleted route table cannot be recovered.</p>
</p></li></ol>
</div>
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</div>
<div class="fignone" id="er_01_0030__fig13563243183610"><a name="er_01_0030__fig13563243183610"></a><a name="fig13563243183610"></a><span class="figcap"><b>Figure 1 </b>Associations</span><br><span><img class="eddx" id="er_01_0030__image8563843133612" src="en-us_image_0000001477452077.png"></span></div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0030__table056334323615" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Association description</caption><thead align="left"><tr id="er_01_0030__row15631843123615"><th align="left" class="cellrowborder" valign="top" width="17.65%" id="mcps1.3.3.2.5.1.1"><p id="er_01_0030__p1156394317361">Attachment Type</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0030__table1654417369518" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Associations</caption><thead align="left"><tr id="er_01_0030__row1554411360511"><th align="left" class="cellrowborder" valign="top" width="17.65%" id="mcps1.3.3.2.5.1.1"><p id="er_01_0030__p55441336185119">Attachment Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="12.479999999999999%" id="mcps1.3.3.2.5.1.2"><p id="er_01_0030__p15563144323618">Route Learning</p>
<th align="left" class="cellrowborder" valign="top" width="12.479999999999999%" id="mcps1.3.3.2.5.1.2"><p id="er_01_0030__p185441236125115">Route Learning</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="37.04%" id="mcps1.3.3.2.5.1.3"><p id="er_01_0030__p1356314431368">Way to Create Association</p>
<th align="left" class="cellrowborder" valign="top" width="37.04%" id="mcps1.3.3.2.5.1.3"><p id="er_01_0030__p10544436135114">Way to Create Association</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="32.83%" id="mcps1.3.3.2.5.1.4"><p id="er_01_0030__p185631543113619">Description</p>
<th align="left" class="cellrowborder" valign="top" width="32.83%" id="mcps1.3.3.2.5.1.4"><p id="er_01_0030__p954412368514">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="er_01_0030__row155634439367"><td class="cellrowborder" valign="top" width="17.65%" headers="mcps1.3.3.2.5.1.1 "><p id="er_01_0030__p1156434313368">VPC</p>
<tbody><tr id="er_01_0030__row754423675119"><td class="cellrowborder" valign="top" width="17.65%" headers="mcps1.3.3.2.5.1.1 "><p id="er_01_0030__p145441136195115">VPC</p>
</td>
<td class="cellrowborder" valign="top" width="12.479999999999999%" headers="mcps1.3.3.2.5.1.2 "><p id="er_01_0030__p656464314364">Not supported</p>
<td class="cellrowborder" valign="top" width="12.479999999999999%" headers="mcps1.3.3.2.5.1.2 "><p id="er_01_0030__p35441236175117">Not supported</p>
</td>
<td class="cellrowborder" rowspan="3" valign="top" width="37.04%" headers="mcps1.3.3.2.5.1.3 "><ul id="er_01_0030__ul18564114353618"><li id="er_01_0030__li195641343153620">Auto creation: If <strong id="er_01_0030__b156946287181">Default Route Table Association</strong> is enabled and the default association route table is specified, attachments are automatically associated with the default association route table.<ul id="er_01_0030__ul6564343153615"><li id="er_01_0030__li20564443173619">If you want to enable this function when you create an enterprise router, refer to <a href="er_01_0069.html">Creating an Enterprise Router</a>.</li><li id="er_01_0030__li35641343173619">If you want to enable this function after an enterprise router is created, refer to <a href="er_01_0013.html">Modifying an Enterprise Router</a>.</li></ul>
</li><li id="er_01_0030__li16564343113610">Manual creation: You can select a route table and create an association in it to associate an attachment with the route table. For details, see <a href="er_01_0031.html">Creating an Association for an Attachment in a Route Table</a>.</li></ul>
<td class="cellrowborder" rowspan="4" valign="top" width="37.04%" headers="mcps1.3.3.2.5.1.3 "><ul id="er_01_0030__ul14544103615114"><li id="er_01_0030__li1354443614518">Auto creation: If <strong id="er_01_0030__b916415935">Default Route Table Association</strong> is enabled and the default association route table is specified, attachments are automatically associated with the default association route table.<ul id="er_01_0030__ul45441236205110"><li id="er_01_0030__li1154416360510">If you want to enable this function when you create an enterprise router, refer to <a href="er_01_0069.html">Creating an Enterprise Router</a>.</li><li id="er_01_0030__li1854483655118">If you want to enable this function after an enterprise router is created, refer to <a href="er_01_0013.html">Modifying an Enterprise Router</a>.</li></ul>
</li><li id="er_01_0030__li4544736105118">Manual creation: You can select a route table and create an association in it to associate an attachment with the route table. For details, see <a href="er_01_0031.html">Creating an Association for an Attachment in a Route Table</a>.</li></ul>
</td>
<td class="cellrowborder" rowspan="3" valign="top" width="32.83%" headers="mcps1.3.3.2.5.1.4 "><p id="er_01_0030__p1356414436363">Each attachment can only be associated with one route table. Associations between attachments in <a href="#er_01_0030__fig13563243183610">Figure 1</a> are described as follows:</p>
<ul id="er_01_0030__ul556424373620"><li id="er_01_0030__li556414393613">Auto creation: The system automatically associates attachments, such as virtual gateway 1, VPC 1, and VPN gateway 1, with the default route table of the enterprise router.</li><li id="er_01_0030__li15645436365">Manual creation: You need to manually create associations in the custom route table of the enterprise router for attachments, such as VPC 2, VPN gateway 2, and virtual gateway 2.</li></ul>
<td class="cellrowborder" rowspan="4" valign="top" width="32.83%" headers="mcps1.3.3.2.5.1.4 "><p id="er_01_0030__p5545936195116">Each attachment can only be associated with one route table. Associations between attachments in <a href="#er_01_0030__fig13563243183610">Figure 1</a> are described as follows:</p>
<ul id="er_01_0030__ul35451036185116"><li id="er_01_0030__li7545193619511">Auto creation: Associations are automatically created to associate attachments, such as virtual gateway 1, VPC 1, and VPN gateway 1, with the default route table of the enterprise router.</li><li id="er_01_0030__li254513685115">Manual creation: You need to manually create associations in the custom route table of the enterprise router for attachments, such as VPC 2, VPN gateway 2, and virtual gateway 2.</li></ul>
</td>
</tr>
<tr id="er_01_0030__row456444303618"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.1 "><p id="er_01_0030__p6564124316369">Virtual gateway</p>
<tr id="er_01_0030__row14545163616516"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.1 "><p id="er_01_0030__p4545193610513">Virtual gateway</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.2 "><p id="er_01_0030__p356417438367">Supported</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.2 "><p id="er_01_0030__p125451365516">Supported</p>
</td>
</tr>
<tr id="er_01_0030__row1556464317366"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.1 "><p id="er_01_0030__p25645434365">VPN gateway</p>
<tr id="er_01_0030__row17545103612511"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.1 "><p id="er_01_0030__p554519368515">VPN gateway</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.2 "><p id="er_01_0030__p14564124311361">Supported</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.2 "><p id="er_01_0030__p9545193613514">Supported</p>
</td>
</tr>
<tr id="er_01_0030__row79051954145112"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.1 "><p id="er_01_0030__p1325584135212">CFW instance</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.5.1.2 "><p id="er_01_0030__p6255348523">Not supported</p>
</td>
</tr>
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<h1 class="topictitle1">Creating an Association for an Attachment in a Route Table</h1>
<div id="body0000001135343274"><div class="section" id="er_01_0031__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0031__p8734113614438">This section describes how to create an association in a route table of an enterprise router to associate a specified attachment with the route table.</p>
</div>
<div class="section" id="er_01_0031__section1696254092616"><h4 class="sectiontitle">Notes and Constraints</h4><p id="er_01_0031__p3257103772719">Each attachment can only be associated with one route table. Packets from the attachment will be forwarded based on the route table.</p>
<div class="section" id="er_01_0031__section174641135103911"><h4 class="sectiontitle">Constraints</h4><p id="er_01_0031__p15606194163915">Each attachment can only be associated with one route table. Packets from the attachment will be forwarded based on the route table.</p>
</div>
<div class="section" id="er_01_0031__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0031__ol11464202427"><li id="er_01_0031__li15845143195320"><span>Log in to the management console.</span></li><li id="er_01_0031__li18272154101917"><span>Click <span><img id="er_01_0031__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0031__li13278035192013"><span>Click <strong id="er_01_0031__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0031__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0031__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0031__er_01_0064_p131231735172115">The <strong id="er_01_0031__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0031__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0031__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0031__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>
@ -22,7 +22,7 @@
<tbody><tr id="er_01_0031__row155661555145112"><td class="cellrowborder" valign="top" width="17.58175817581758%" headers="mcps1.3.3.2.7.2.1.2.4.1.1 "><p id="er_01_0031__p65701255175113">Attachment Type</p>
</td>
<td class="cellrowborder" valign="top" width="59.94599459945994%" headers="mcps1.3.3.2.7.2.1.2.4.1.2 "><p id="er_01_0031__p18653105983416">Mandatory</p>
<div class="p" id="er_01_0031__p18290848124616">Select an attachment type.<ul id="er_01_0031__ul19290124834615"><li id="er_01_0031__li75401451154719"><strong id="er_01_0031__b7751692310">VPC</strong>: A VPC is attached to the enterprise router.</li><li id="er_01_0031__li18540105119474"><strong id="er_01_0031__b1584334517376">Virtual gateway</strong>: A Direct Connect virtual gateway is attached to the enterprise router.</li><li id="er_01_0031__li20331201744"><strong id="er_01_0031__b1870831941019">VPN gateway</strong>: A VPN gateway is attached to the enterprise router.</li></ul>
<div class="p" id="er_01_0031__p18290848124616">Select an attachment type.<ul id="er_01_0031__ul19290124834615"><li id="er_01_0031__li75401451154719"><strong id="er_01_0031__b7751692310">VPC</strong>: A VPC is attached to the enterprise router.</li><li id="er_01_0031__li18540105119474"><strong id="er_01_0031__b1584334517376">Virtual gateway</strong>: A Direct Connect virtual gateway is attached to the enterprise router.</li><li id="er_01_0031__li20331201744"><strong id="er_01_0031__b1870831941019">VPN gateway</strong>: A VPN gateway is attached to the enterprise router.</li><li id="er_01_0031__li165662565611"><strong id="er_01_0031__b87471334102516">CFW instance</strong>: A VPC border firewall is attached to the enterprise router.</li></ul>
</div>
<p id="er_01_0031__p16612593580">For more information, see <a href="er_01_0019.html">Attachment Overview</a>.</p>
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</p></li><li id="er_01_0033__li560411203526"><span>Go to the <strong id="er_01_0033__b58279565617">Route Tables</strong> tab using either of the following methods:</span><p><ul id="er_01_0033__ul1991183111311"><li id="er_01_0033__li14916391316">In the upper right corner of the enterprise router, click <strong id="er_01_0033__b45622588612">Manage Route Table</strong>.</li><li id="er_01_0033__li791113151319">Click the enterprise router name and click <span class="wintitle" id="er_01_0033__wintitle924321471"><b>Route Tables</b></span>.</li></ul>
<div class="fignone" id="er_01_0033__fig416985923011"><span class="figcap"><b>Figure 2 </b>Deleting an association</span><br><span><img id="er_01_0033__image65442719457" src="en-us_image_0000001675139170.png"></span></div>
</p></li><li id="er_01_0033__li25751958135516"><span>Click the route table that you want to delete an association from. On the <strong id="er_01_0033__b324512430916">Associations</strong> tab, locate the association you want to delete and click <strong id="er_01_0033__b624624313916">Delete</strong> in the <strong id="er_01_0033__b12246643598">Operation</strong> column.</span><p><p id="er_01_0033__p129574201286">A confirmation dialog box is displayed.</p>
</p></li><li id="er_01_0033__li13878182382819"><span>Click <strong id="er_01_0033__b9380797157">Yes</strong>.</span><p><p id="er_01_0033__p33095150289">A deleted association cannot be recovered.</p>
</p></li><li id="er_01_0033__li13878182382819"><span>Confirm the information and click <strong id="er_01_0033__b49541397288">Yes</strong>.</span><p><p id="er_01_0033__p33095150289">A deleted association cannot be recovered.</p>
</p></li></ol>
</div>
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<p id="er_01_0035__p104399816140">If you do not want to create a propagation, you can manually add static routes for attachments to the route tables.</p>
<div class="fignone" id="er_01_0035__fig421415328433"><a name="er_01_0035__fig421415328433"></a><a name="fig421415328433"></a><span class="figcap"><b>Figure 1 </b>Propagated routes and static routes</span><br><span><img class="eddx" id="er_01_0035__image521563218438" src="en-us_image_0000001477172813.png"></span></div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0035__table5215432124314" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Propagation description</caption><thead align="left"><tr id="er_01_0035__row13215173216436"><th align="left" class="cellrowborder" valign="top" width="17.9%" id="mcps1.3.4.2.5.1.1"><p id="er_01_0035__p1021510321438">Attachment Type</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0035__table8718238115211" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Propagations</caption><thead align="left"><tr id="er_01_0035__row19718538195217"><th align="left" class="cellrowborder" valign="top" width="17.9%" id="mcps1.3.4.2.5.1.1"><p id="er_01_0035__p177189382523">Attachment Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="11.95%" id="mcps1.3.4.2.5.1.2"><p id="er_01_0035__p10215183218438">Propagated Info</p>
<th align="left" class="cellrowborder" valign="top" width="11.95%" id="mcps1.3.4.2.5.1.2"><p id="er_01_0035__p3718153815521">Propagated Info</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="37.19%" id="mcps1.3.4.2.5.1.3"><p id="er_01_0035__p17215432124318">Way to Create Propagation</p>
<th align="left" class="cellrowborder" valign="top" width="37.19%" id="mcps1.3.4.2.5.1.3"><p id="er_01_0035__p147181738185218">Way to Create Propagation</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="32.96%" id="mcps1.3.4.2.5.1.4"><p id="er_01_0035__p12215183212435">Description</p>
<th align="left" class="cellrowborder" valign="top" width="32.96%" id="mcps1.3.4.2.5.1.4"><p id="er_01_0035__p7718153817524">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="er_01_0035__row19215133210434"><td class="cellrowborder" valign="top" width="17.9%" headers="mcps1.3.4.2.5.1.1 "><p id="er_01_0035__p10215632124319">VPC</p>
<tbody><tr id="er_01_0035__row97186388522"><td class="cellrowborder" valign="top" width="17.9%" headers="mcps1.3.4.2.5.1.1 "><p id="er_01_0035__p11718538165219">VPC</p>
</td>
<td class="cellrowborder" valign="top" width="11.95%" headers="mcps1.3.4.2.5.1.2 "><p id="er_01_0035__p17215113210439">VPC CIDR blocks</p>
<td class="cellrowborder" valign="top" width="11.95%" headers="mcps1.3.4.2.5.1.2 "><p id="er_01_0035__p871873875220">VPC CIDR blocks</p>
</td>
<td class="cellrowborder" rowspan="3" valign="top" width="37.19%" headers="mcps1.3.4.2.5.1.3 "><ul id="er_01_0035__ul92151332144311"><li id="er_01_0035__li1121519324433">Auto creation: If <strong id="er_01_0035__b126541056181517">Default Route Table Propagation</strong> is enabled and the default propagation route table is specified, attachments automatically propagate routes to the default propagation route table.<ul id="er_01_0035__ul62151432134315"><li id="er_01_0035__li81799168313">If you want to enable this function when you create an enterprise router, refer to <a href="er_01_0069.html">Creating an Enterprise Router</a>.</li><li id="er_01_0035__li181800163316">If you want to enable this function after an enterprise router is created, refer to <a href="er_01_0013.html">Modifying an Enterprise Router</a>.</li></ul>
</li><li id="er_01_0035__li20215153264315">Manual creation: You can select a route table and create a propagation for an attachment in the route table. For details, see <a href="er_01_0036.html">Creating a Propagation for an Attachment in the Route Table</a>.</li></ul>
<td class="cellrowborder" rowspan="4" valign="top" width="37.19%" headers="mcps1.3.4.2.5.1.3 "><ul id="er_01_0035__ul471893812520"><li id="er_01_0035__li771813805219">Auto creation: If <strong id="er_01_0035__b1839880077">Default Route Table Propagation</strong> is enabled and the default propagation route table is specified, attachments automatically propagate routes to the default propagation route table.<ul id="er_01_0035__ul5718113875217"><li id="er_01_0035__li8718193818528">If you want to enable this function when you create an enterprise router, refer to <a href="er_01_0069.html">Creating an Enterprise Router</a>.</li><li id="er_01_0035__li12718163855219">If you want to enable this function after an enterprise router is created, refer to <a href="er_01_0013.html">Modifying an Enterprise Router</a>.</li></ul>
</li><li id="er_01_0035__li37181938175220">Manual creation: You can select a route table and create a propagation for an attachment in the route table. For details, see <a href="er_01_0036.html">Creating a Propagation for an Attachment in the Route Table</a>.</li></ul>
<p id="er_01_0035__p19526171115316"></p>
</td>
<td class="cellrowborder" rowspan="3" valign="top" width="32.96%" headers="mcps1.3.4.2.5.1.4 "><p id="er_01_0035__p1321513215435">An attachment can be propagated to different route tables. You can create propagations for attachments in <a href="#er_01_0035__fig421415328433">Figure 1</a> as follows:</p>
<ul id="er_01_0035__ul72151832124315"><li id="er_01_0035__li1321513322439">Auto creation: Propagations are automatically created for the attachments, such as virtual gateway 1, VPN gateway 1, and VPC 1 attachments, in the default propagation route table of the enterprise router.</li><li id="er_01_0035__li7215103217431">Manual creation: You need to manually create propagations in the custom route table of the enterprise router for attachments, such as virtual gateway 1, VPC 1, VPN gateway 2, and virtual gateway 2 attachments.</li><li id="er_01_0035__li9215532124314">No propagation: If you do not want to use propagated routes, you need to manually add static routes to the custom route table of the enterprise router for attachments, such as VPC 2 attachment.</li></ul>
<td class="cellrowborder" rowspan="4" valign="top" width="32.96%" headers="mcps1.3.4.2.5.1.4 "><p id="er_01_0035__p971811385522">An attachment can be propagated to different route tables. You can create propagations for attachments in <a href="#er_01_0035__fig421415328433">Figure 1</a> as follows:</p>
<ul id="er_01_0035__ul1671883875213"><li id="er_01_0035__li6718103845220">Auto creation: Propagations are automatically created for the attachments, such as virtual gateway 1, VPN gateway 1, and VPC 1 attachments, in the default propagation route table of the enterprise router.</li><li id="er_01_0035__li071983895210">Manual creation: You need to manually create propagations in the custom route table of the enterprise router for attachments, such as virtual gateway 1, VPC 1, VPN gateway 2, and virtual gateway 2 attachments.</li><li id="er_01_0035__li13719173885220">No propagation: If you do not want to use propagated routes, you need to manually add static routes to the custom route table of the enterprise router for attachments, such as VPC 2 attachment.</li></ul>
<p id="er_01_0035__p952621185311"></p>
</td>
</tr>
<tr id="er_01_0035__row1821583219437"><td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.1 "><p id="er_01_0035__p121520324431">Virtual gateway</p>
<tr id="er_01_0035__row1071913381523"><td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.1 "><p id="er_01_0035__p17191438165211">Virtual gateway</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.2 "><p id="er_01_0035__p6215332104314">All routes</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.2 "><p id="er_01_0035__p471912389526">All routes</p>
</td>
</tr>
<tr id="er_01_0035__row192151332174310"><td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.1 "><p id="er_01_0035__p921516322434">VPN gateway</p>
<tr id="er_01_0035__row1771933895218"><td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.1 "><p id="er_01_0035__p27194383521">VPN gateway</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.2 "><p id="er_01_0035__p42151632164318">All routes</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.2 "><p id="er_01_0035__p1171963820527">All routes</p>
</td>
</tr>
<tr id="er_01_0035__row75261511538"><td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.1 "><p id="er_01_0035__p1271712255310">CFW instance</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.4.2.5.1.2 "><p id="er_01_0035__p871711215531">CIDR blocks of the VPCs protected by CFW</p>
</td>
</tr>
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<h1 class="topictitle1">Creating a Propagation for an Attachment in the Route Table</h1>
<div id="body0000001135505542"><div class="section" id="er_01_0036__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0036__p8734113614438">This section describes how to create a propagation in the route table of an enterprise router.</p>
</div>
<div class="section" id="er_01_0036__section1696254092616"><h4 class="sectiontitle">Notes</h4><p id="er_01_0036__p3257103772719">You can create propagations for the same attachment in different route tables.</p>
<div class="section" id="er_01_0036__section15505145553914"><h4 class="sectiontitle">Constraints</h4><p id="er_01_0036__p1326565863913">You can create propagations for the same attachment in different route tables.</p>
</div>
<div class="section" id="er_01_0036__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0036__ol11464202427"><li id="er_01_0036__li147061611536"><span>Log in to the management console.</span></li><li id="er_01_0036__li18272154101917"><span>Click <span><img id="er_01_0036__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0036__li13278035192013"><span>Click <strong id="er_01_0036__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0036__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0036__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0036__er_01_0064_p131231735172115">The <strong id="er_01_0036__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0036__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0036__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0036__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>
@ -22,7 +22,7 @@
<tbody><tr id="er_01_0036__row155661555145112"><td class="cellrowborder" valign="top" width="17.711771177117715%" headers="mcps1.3.3.2.7.2.1.2.4.1.1 "><p id="er_01_0036__p65701255175113">Attachment Type</p>
</td>
<td class="cellrowborder" valign="top" width="61.996199619962%" headers="mcps1.3.3.2.7.2.1.2.4.1.2 "><p id="er_01_0036__p18653105983416">Mandatory</p>
<div class="p" id="er_01_0036__p18290848124616">Select an attachment type.<ul id="er_01_0036__er_01_0031_ul19290124834615"><li id="er_01_0036__er_01_0031_li75401451154719"><strong id="er_01_0036__er_01_0031_b7751692310">VPC</strong>: A VPC is attached to the enterprise router.</li><li id="er_01_0036__er_01_0031_li18540105119474"><strong id="er_01_0036__er_01_0031_b1584334517376">Virtual gateway</strong>: A Direct Connect virtual gateway is attached to the enterprise router.</li><li id="er_01_0036__er_01_0031_li20331201744"><strong id="er_01_0036__er_01_0031_b1870831941019">VPN gateway</strong>: A VPN gateway is attached to the enterprise router.</li></ul>
<div class="p" id="er_01_0036__p18290848124616">Select an attachment type.<ul id="er_01_0036__er_01_0031_ul19290124834615"><li id="er_01_0036__er_01_0031_li75401451154719"><strong id="er_01_0036__er_01_0031_b7751692310">VPC</strong>: A VPC is attached to the enterprise router.</li><li id="er_01_0036__er_01_0031_li18540105119474"><strong id="er_01_0036__er_01_0031_b1584334517376">Virtual gateway</strong>: A Direct Connect virtual gateway is attached to the enterprise router.</li><li id="er_01_0036__er_01_0031_li20331201744"><strong id="er_01_0036__er_01_0031_b1870831941019">VPN gateway</strong>: A VPN gateway is attached to the enterprise router.</li><li id="er_01_0036__er_01_0031_li165662565611"><strong id="er_01_0036__er_01_0031_b87471334102516">CFW instance</strong>: A VPC border firewall is attached to the enterprise router.</li></ul>
</div>
<p id="er_01_0036__p16612593580">For more information, see <a href="er_01_0019.html">Attachment Overview</a>.</p>
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<h1 class="topictitle1">Deleting a Propagation from a Route Table</h1>
<div id="body0000001181305151"><div class="section" id="er_01_0038__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0038__p8734113614438">This section describes how to delete a propagation from the route table of an enterprise router.</p>
</div>
<div class="section" id="er_01_0038__section18606105016717"><h4 class="sectiontitle">Notes and Constraints</h4><p id="er_01_0038__p6760131516189">Propagated routes are learned through propagation. Deleting a propagation will also delete the propagated routes.</p>
<div class="section" id="er_01_0038__section18606105016717"><h4 class="sectiontitle">Constraints</h4><p id="er_01_0038__p6760131516189">Propagated routes are learned through propagation. Deleting a propagation will also delete the propagated routes.</p>
</div>
<div class="section" id="er_01_0038__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0038__ol11464202427"><li id="er_01_0038__li5650102318532"><span>Log in to the management console.</span></li><li id="er_01_0038__li18272154101917"><span>Click <span><img id="er_01_0038__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0038__li13278035192013"><span>Click <strong id="er_01_0038__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0038__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0038__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0038__er_01_0064_p131231735172115">The <strong id="er_01_0038__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0038__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0038__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0038__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>
</p></li><li id="er_01_0038__li560411203526"><span>Go to the <strong id="er_01_0038__b756218154317">Route Tables</strong> tab using either of the following methods:</span><p><ul id="er_01_0038__ul1991183111311"><li id="er_01_0038__li14916391316">In the upper right corner of the enterprise router, click <strong id="er_01_0038__b121051918438">Manage Route Table</strong>.</li><li id="er_01_0038__li791113151319">Click the enterprise router name and click <span class="wintitle" id="er_01_0038__wintitle203452024310"><b>Route Tables</b></span>.</li></ul>
<div class="fignone" id="er_01_0038__fig1695556103517"><span class="figcap"><b>Figure 2 </b>Deleting a propagation</span><br><span><img id="er_01_0038__image1675125123616" src="en-us_image_0000001675130592.png"></span></div>
</p></li><li id="er_01_0038__li25751958135516"><span>Click the route table where you want to delete a propagation. On the <strong id="er_01_0038__b182152417424">Propagations</strong> tab, locate the propagation you want to delete and click <strong id="er_01_0038__b62151541184217">Delete</strong> in the <strong id="er_01_0038__b1421584110427">Operation</strong> column.</span><p><p id="er_01_0038__p129574201286">A confirmation dialog box is displayed.</p>
</p></li><li id="er_01_0038__li13878182382819"><span>Click <strong id="er_01_0038__b9935437154220">Yes</strong>.</span><p><p id="er_01_0038__p33095150289">A deleted propagation cannot be recovered.</p>
</p></li><li id="er_01_0038__li13878182382819"><span>Confirm the information and click <strong id="er_01_0038__b59471122112811">Yes</strong>.</span><p><p id="er_01_0038__p33095150289">A deleted propagation cannot be recovered.</p>
</p></li></ol>
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</table>
</div>
</div>
<div class="section" id="er_01_0040__section12687033047"><h4 class="sectiontitle">Route Priority</h4><p id="er_01_0040__p08852411506">If there are multiple routes with the same destination but different targets in a route table, the route priority is as follows:</p>
<p id="er_01_0040__p460735184811">Static route &gt; Propagated route for VPC attachment &gt; Propagated route for virtual gateway attachment &gt; Propagated route for VPN gateway attachment</p>
<div class="section" id="er_01_0040__section12687033047"><h4 class="sectiontitle">Route Priority</h4><p id="er_01_0040__p08852411506">If there are multiple routes with the same destination in a route table, the route priority is as follows:</p>
<p id="er_01_0040__p85822436533">Static route &gt; Propagated route for VPC attachment = Propagated route for CFW instance attachment &gt; Propagated route for virtual gateway attachment &gt; Propagated route for VPN gateway attachment</p>
<div class="note" id="er_01_0040__note4278100175119"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="er_01_0040__er_01_0011_ul31646362196"><li id="er_01_0040__er_01_0011_li6164203611192">Static routes are manually configured and the destination of each static route must be unique in a route table.</li><li id="er_01_0040__er_01_0011_li1164163681911">Propagated routes are automatically learned by the system and may have the same destination in a route table.</li><li id="er_01_0040__er_01_0011_li81641736141920">A static route and a propagated route may have the same destination in a route table.</li></ul>
</div></div>
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<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.2.2.7.2.1.2.4.1.3 "><p id="er_01_0041__p1637919476499">-</p>
</td>
</tr>
<tr id="er_01_0041__row197716484118"><td class="cellrowborder" valign="top" width="17.57175717571757%" headers="mcps1.3.2.2.7.2.1.2.4.1.1 "><p id="er_01_0041__p206617541916">Attachment Type</p>
<tr id="er_01_0041__row155661555145112"><td class="cellrowborder" valign="top" width="17.57175717571757%" headers="mcps1.3.2.2.7.2.1.2.4.1.1 "><p id="er_01_0041__p65701255175113">Attachment Type</p>
</td>
<td class="cellrowborder" valign="top" width="60.35603560356036%" headers="mcps1.3.2.2.7.2.1.2.4.1.2 "><ul id="er_01_0041__ul103054590257"><li id="er_01_0041__li530516594258">If <strong id="er_01_0041__b72105588">Blackhole Route</strong> is not enabled, you need to configure this parameter.</li><li id="er_01_0041__li8305135920258">If <strong id="er_01_0041__b449514192181">Blackhole Route</strong> is enabled, you do not need to configure this parameter.</li></ul>
<p id="er_01_0041__p126616541513"><strong id="er_01_0041__b5998182517515">VPC</strong>: Create a static route for a VPC attachment.</p>
<p id="er_01_0041__p1266454817">For more information, see <a href="er_01_0019.html">Attachment Overview</a>.</p>
<td class="cellrowborder" valign="top" width="60.35603560356036%" headers="mcps1.3.2.2.7.2.1.2.4.1.2 "><ul id="er_01_0041__ul23721844203116"><li id="er_01_0041__li23721344153118">If <strong id="er_01_0041__b680780135012">Blackhole Route</strong> is not enabled, you need to configure this parameter.</li><li id="er_01_0041__li11372344123110">If <strong id="er_01_0041__b1414419932012">Blackhole Route</strong> is enabled, you do not need to configure this parameter.</li></ul>
<div class="p" id="er_01_0041__p18290848124616">Select an attachment type.<ul id="er_01_0041__er_01_0031_ul19290124834615"><li id="er_01_0041__er_01_0031_li75401451154719"><strong id="er_01_0041__b1457918813511">VPC</strong>: Create a static route for a VPC attachment.</li><li id="er_01_0041__li15363922103613"><strong id="er_01_0041__b6953153917283">CFW instance</strong>: Create a static route for a VPC border firewall that is attached to the enterprise router.</li></ul>
</div>
<p id="er_01_0041__p16612593580">For more information, see <a href="er_01_0019.html">Attachment Overview</a>.</p>
</td>
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.2.2.7.2.1.2.4.1.3 "><p id="er_01_0041__p866354418">VPC</p>
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.2.2.7.2.1.2.4.1.3 "><p id="er_01_0041__p17160135317421">VPC</p>
</td>
</tr>
<tr id="er_01_0041__row9114149307"><td class="cellrowborder" valign="top" width="17.57175717571757%" headers="mcps1.3.2.2.7.2.1.2.4.1.1 "><p id="er_01_0041__p1331617105328">Next Hop</p>
@ -51,6 +52,14 @@
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.2.2.7.2.1.2.4.1.3 "><p id="er_01_0041__p10316171013220">er-attach-01</p>
</td>
</tr>
<tr id="er_01_0041__row18400173317311"><td class="cellrowborder" valign="top" width="17.57175717571757%" headers="mcps1.3.2.2.7.2.1.2.4.1.1 "><p id="er_01_0041__p1874416121327">Description</p>
</td>
<td class="cellrowborder" valign="top" width="60.35603560356036%" headers="mcps1.3.2.2.7.2.1.2.4.1.2 "><p id="er_01_0041__p231681016328">Optional</p>
<p id="er_01_0041__p16744201263215">Describe the route for easy identification.</p>
</td>
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.2.2.7.2.1.2.4.1.3 "><p id="er_01_0041__p10744161293211">-</p>
</td>
</tr>
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<ul id="er_01_0042__ul42441564124"><li id="er_01_0042__li224436111219">Change a common route to a blackhole route.</li><li id="er_01_0042__li1224418614123">Change the attachment type and next hop of a common route.</li></ul>
<p id="er_01_0042__p24241519124118">Only static routes can be modified. Propagation routes cannot be modified.</p>
</div>
<div class="section" id="er_01_0042__section534985415351"><h4 class="sectiontitle">Notes and Constraints</h4><p id="er_01_0042__p1374173614215">To change the destination of a static route, delete this static route and create another one with your desired destination.</p>
<div class="section" id="er_01_0042__section534985415351"><h4 class="sectiontitle">Constraints</h4><p id="er_01_0042__p1374173614215">To change the destination of a static route, delete this static route and create another one with your desired destination.</p>
</div>
<div class="section" id="er_01_0042__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0042__ol11464202427"><li id="er_01_0042__li2085313213538"><span>Log in to the management console.</span></li><li id="er_01_0042__li18272154101917"><span>Click <span><img id="er_01_0042__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0042__li13278035192013"><span>Click <strong id="er_01_0042__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0042__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0042__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0042__er_01_0064_p131231735172115">The <strong id="er_01_0042__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0042__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0042__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0042__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>
@ -29,13 +29,14 @@
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.3.2.7.2.1.2.4.1.3 "><p id="er_01_0042__p1637919476499">-</p>
</td>
</tr>
<tr id="er_01_0042__row1543631814213"><td class="cellrowborder" valign="top" width="17.57175717571757%" headers="mcps1.3.3.2.7.2.1.2.4.1.1 "><p id="er_01_0042__p206617541916">Attachment Type</p>
<tr id="er_01_0042__er_01_0041_row155661555145112"><td class="cellrowborder" valign="top" width="17.57175717571757%" headers="mcps1.3.3.2.7.2.1.2.4.1.1 "><p id="er_01_0042__er_01_0041_p65701255175113">Attachment Type</p>
</td>
<td class="cellrowborder" valign="top" width="60.35603560356036%" headers="mcps1.3.3.2.7.2.1.2.4.1.2 "><ul id="er_01_0042__ul711651941015"><li id="er_01_0042__li511651910100">If <strong id="er_01_0042__b0189217142417">Blackhole Route</strong> is not enabled, you need to configure this parameter.</li><li id="er_01_0042__li1711618190107">If <strong id="er_01_0042__b2344145710347">Blackhole Route</strong> is enabled, you do not need to configure this parameter.</li></ul>
<p id="er_01_0042__p126616541513"><strong id="er_01_0042__b141014325710">VPC</strong>: A VPC is attached to the enterprise router.</p>
<p id="er_01_0042__p1266454817">For more information, see <a href="er_01_0019.html">Attachment Overview</a>.</p>
<td class="cellrowborder" valign="top" width="60.35603560356036%" headers="mcps1.3.3.2.7.2.1.2.4.1.2 "><ul id="er_01_0042__ul23721844203116"><li id="er_01_0042__li23721344153118">If <strong id="er_01_0042__b2578185143411">Blackhole Route</strong> is not enabled, you need to configure this parameter.</li><li id="er_01_0042__li11372344123110">If <strong id="er_01_0042__b8414125293418">Blackhole Route</strong> is enabled, you do not need to configure this parameter.</li></ul>
<div class="p" id="er_01_0042__er_01_0041_p18290848124616">Select an attachment type.<ul id="er_01_0042__er_01_0041_er_01_0031_ul19290124834615"><li id="er_01_0042__er_01_0041_er_01_0031_li75401451154719"><strong id="er_01_0042__er_01_0041_b1457918813511">VPC</strong>: Create a static route for a VPC attachment.</li><li id="er_01_0042__er_01_0041_li15363922103613"><strong id="er_01_0042__er_01_0041_b6953153917283">CFW instance</strong>: Create a static route for a VPC border firewall that is attached to the enterprise router.</li></ul>
</div>
<p id="er_01_0042__er_01_0041_p16612593580">For more information, see <a href="er_01_0019.html">Attachment Overview</a>.</p>
</td>
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.3.2.7.2.1.2.4.1.3 "><p id="er_01_0042__p866354418">VPC</p>
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.3.2.7.2.1.2.4.1.3 "><p id="er_01_0042__er_01_0041_p17160135317421">VPC</p>
</td>
</tr>
<tr id="er_01_0042__er_01_0041_row9114149307"><td class="cellrowborder" valign="top" width="17.57175717571757%" headers="mcps1.3.3.2.7.2.1.2.4.1.1 "><p id="er_01_0042__er_01_0041_p1331617105328">Next Hop</p>
@ -46,6 +47,14 @@
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.3.2.7.2.1.2.4.1.3 "><p id="er_01_0042__er_01_0041_p10316171013220">er-attach-01</p>
</td>
</tr>
<tr id="er_01_0042__row1873981017402"><td class="cellrowborder" valign="top" width="17.57175717571757%" headers="mcps1.3.3.2.7.2.1.2.4.1.1 "><p id="er_01_0042__p1874416121327">Description</p>
</td>
<td class="cellrowborder" valign="top" width="60.35603560356036%" headers="mcps1.3.3.2.7.2.1.2.4.1.2 "><p id="er_01_0042__p231681016328">Optional</p>
<p id="er_01_0042__p16744201263215">Modify the description of the route.</p>
</td>
<td class="cellrowborder" valign="top" width="22.072207220722074%" headers="mcps1.3.3.2.7.2.1.2.4.1.3 "><p id="er_01_0042__p10744161293211">-</p>
</td>
</tr>
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<div class="section" id="er_01_0043__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0043__ol11464202427"><li id="er_01_0043__li16307163685311"><span>Log in to the management console.</span></li><li id="er_01_0043__li18272154101917"><span>Click <span><img id="er_01_0043__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0043__li13278035192013"><span>Click <strong id="er_01_0043__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0043__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0043__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0043__er_01_0064_p131231735172115">The <strong id="er_01_0043__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0043__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0043__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0043__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>
</p></li><li id="er_01_0043__li560411203526"><span>Go to the <strong id="er_01_0043__b91811144346">Route Tables</strong> tab using either of the following methods:</span><p><ul id="er_01_0043__ul1991183111311"><li id="er_01_0043__li14916391316">In the upper right corner of the enterprise router, click <strong id="er_01_0043__b18874158343">Manage Route Table</strong>.</li><li id="er_01_0043__li791113151319">Click the enterprise router name and click <span class="wintitle" id="er_01_0043__wintitle18441516123411"><b>Route Tables</b></span>.</li></ul>
<div class="fignone" id="er_01_0043__fig19135104905411"><span class="figcap"><b>Figure 2 </b>Viewing routes</span><br><span><img id="er_01_0043__image9282152645517" src="en-us_image_0000001723064325.png"></span></div>
<div class="fignone" id="er_01_0043__fig19135104905411"><span class="figcap"><b>Figure 2 </b>Viewing routes</span><br><span><img id="er_01_0043__image11949201916619" src="en-us_image_0000002246156645.png"></span></div>
</p></li><li id="er_01_0043__li25751958135516"><span>Click the route table whose routes you want to view. On the <strong id="er_01_0043__b20212115723420">Routes</strong> tab, view the routes.</span><p><p id="er_01_0043__p756375085812">Each route includes information such as the destination, next hop, attachment type, and route type.</p>
</p></li></ol>
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</p></li><li id="er_01_0044__li560411203526"><span>Go to the <strong id="er_01_0044__b8388123414354">Route Tables</strong> tab using either of the following methods:</span><p><ul id="er_01_0044__ul1991183111311"><li id="er_01_0044__li14916391316">In the upper right corner of the enterprise router, click <strong id="er_01_0044__b05403356353">Manage Route Table</strong>.</li><li id="er_01_0044__li791113151319">Click the enterprise router name and click <span class="wintitle" id="er_01_0044__wintitle5711103613518"><b>Route Tables</b></span>.</li></ul>
<div class="fignone" id="er_01_0044__fig9948644155514"><span class="figcap"><b>Figure 2 </b>Deleting a static route</span><br><span><img id="er_01_0044__image176981059195514" src="en-us_image_0000001723184881.png"></span></div>
</p></li><li id="er_01_0044__li25751958135516"><span>Click the route table where you want to delete a route. On the <strong id="er_01_0044__b076154153510">Routes</strong> tab, locate the route and click <strong id="er_01_0044__b677364114354">Delete</strong> in the <strong id="er_01_0044__b5774641203513">Operation</strong> column.</span><p><p id="er_01_0044__p756375085812">A confirmation dialog box is displayed.</p>
</p></li><li id="er_01_0044__li128218233401"><span>Click <strong id="er_01_0044__b173101695444">Yes</strong>.</span><p><p id="er_01_0044__p33095150289">A deleted static route cannot be recovered.</p>
</p></li><li id="er_01_0044__li128218233401"><span>Confirm the information and click <strong id="er_01_0044__b6667132112817">Yes</strong>.</span><p><p id="er_01_0044__p33095150289">A deleted static route cannot be recovered.</p>
<p id="er_01_0044__p6891857163">Wait for 2 to 3 seconds, and click <span><img id="er_01_0044__image1943775031419" src="en-us_image_0000001434293421.png"></span> to refresh the route list. The route does not exist in the list.</p>
</p></li></ol>
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<div id="body0000001135505712"><p id="er_01_0047__p15660115175819">Custom policies can be created to supplement system-defined policies of Enterprise Router. </p>
<p id="er_01_0047__p1391019913815">You can create custom policies in either of the following ways:</p>
<ul id="er_01_0047__ul1146431393818"><li id="er_01_0047__li5764181518386">Visual editor: Select cloud services, actions, resources, and request conditions. This does not require knowledge of policy syntax.</li><li id="er_01_0047__li546410135389">JSON: Edit JSON policies from scratch or based on an existing policy.</li></ul>
<p id="er_01_0047__p82911030103912">For details about how to create custom policies, see <a href="https://docs.otc.t-systems.com/identity-access-management/umn/user_guide/permissions/creating_a_custom_policy.html" target="_blank" rel="noopener noreferrer">Creating a Custom Policy</a>. The following section contains examples of common Enterprise Router custom policies.</p>
<p id="er_01_0047__p82911030103912">For details about how to create custom policies, see <a href="https://docs.otc.t-systems.com/identity-access-management/umn/user_guide/permissions/creating_a_custom_policy.html" target="_blank" rel="noopener noreferrer">Creating a Custom Policy</a>. The following are examples of common Enterprise Router custom policies.</p>
<div class="section" id="er_01_0047__section7529733164812"><h4 class="sectiontitle">Example Custom Policies</h4><ul id="er_01_0047__ul2504185715494"><li id="er_01_0047__li5504357164912">Example 1: Allowing users to create and delete enterprise routers<pre class="screen" id="er_01_0047__screen48273211535">{
"Version": "1.1",
"Statement": [

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<h1 class="topictitle1">Overview</h1>
<div id="body0000001135541288"><p id="er_01_0056__en-us_topic_0040259342_p1415804616467">Quotas can limit the number or amount of resources available to users, for example, how many enterprise routers can be created, how many attachments can be created for each enterprise router, and how many routes can be added to each route table.</p>
<p id="er_01_0056__en-us_topic_0040259342_p547171214515">You can also request for increased quotas if your existing quotas cannot meet your service requirements.</p>
<div class="p" id="er_01_0056__en-us_topic_0040259342_p547171214515">You can also request higher quotas if your existing quotas cannot meet your service requirements.<ul id="er_01_0056__ul1584344111313"><li id="er_01_0056__li98432419312"><a href="er_01_0057.html">Viewing Quotas</a>: View used quotas and total quotas.</li><li id="er_01_0056__li589118541234"><a href="er_01_0058.html">Increasing Quotas</a>: Request a quota increase.</li></ul>
</div>
</div>
<div>
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<h1 class="topictitle1">Viewing Quotas</h1>
<div id="body0000001135345928"><div class="section" id="er_01_0057__section1259721519218"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0057__p17651320182120">The following provides operations for you to view the quotas of enterprise routers and related resources in your account.</p>
</div>
<div class="section" id="er_01_0057__section1378992109"><h4 class="sectiontitle">How Do I View My Quota?</h4><ol id="er_01_0057__ol10265645175910"><li id="er_01_0057__li9265114575911">Log in to the management console.</li><li id="er_01_0057__li13265114565913">Click <span><img id="er_01_0057__image526511457593" src="en-us_image_0000001716625548.png"></span> in the upper left corner and select the desired region and project.</li><li id="er_01_0057__li1626511451596">In the upper right corner of the page, click <span><img id="er_01_0057__image15265194513591" src="en-us_image_0000001716466100.png"></span>.<p id="er_01_0057__p42650456591">The <strong id="er_01_0057__b732735020510">Service Quota</strong> page is displayed.</p>
<div class="fignone" id="er_01_0057__fig194072588216"><span class="figcap"><b>Figure 1 </b>Service Quota</span><br><span><img id="er_01_0057__image104209385394" src="en-us_image_0000002074955185.png"></span></div>
<div class="section" id="er_01_0057__section1378992109"><h4 class="sectiontitle">How Do I View My Quota?</h4><ol id="er_01_0057__ol10265645175910"><li id="er_01_0057__li9265114575911">Log in to the management console.</li><li id="er_01_0057__li13265114565913">Click <span><img id="er_01_0057__image526511457593" src="en-us_image_0000001716625548.png"></span> in the upper left corner and select the desired region and project.</li><li id="er_01_0057__li1626511451596">In the upper right corner of the page, click <span><img id="er_01_0057__image15265194513591" src="en-us_image_0000001716466100.png"></span>.<div class="p" id="er_01_0057__p42650456591">The <strong id="er_01_0057__b732735020510">Service Quota</strong> page is displayed. The following quota items are not supported:<ul id="er_01_0057__ul99886449187"><li id="er_01_0057__li169887447185">CAN Attachment</li><li id="er_01_0057__li1891981716197">Connect Attachment</li><li id="er_01_0057__li13535152162016">multicast domain</li><li id="er_01_0057__li12719234182110">multicast domain association</li><li id="er_01_0057__li0239125916213">CC Attachment</li></ul>
</div>
<div class="fignone" id="er_01_0057__fig194072588216"><span class="figcap"><b>Figure 1 </b>Service Quota</span><br><span><img id="er_01_0057__image51744561612" src="en-us_image_0000002277279113.png"></span></div>
</li><li id="er_01_0057__li1826534513594">On the <strong id="er_01_0057__b436124710610">Service Quota</strong> page, view the used and total resource quotas.<p id="er_01_0057__p132661545175919">If a quota cannot meet your needs, apply for a higher quota by performing the operations in the next section.</p>
</li></ol>
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</thead>
<tbody><tr id="er_01_0063__row18325428125113"><td class="cellrowborder" valign="top" width="33.31666833316668%" headers="mcps1.3.2.6.2.4.1.1 "><p id="er_01_0063__p19325162812512">10.0.0.0/8</p>
</td>
<td class="cellrowborder" valign="top" width="33.31666833316668%" headers="mcps1.3.2.6.2.4.1.2 "><p id="er_01_0063__p1432592819512">Enterprise router</p>
<td class="cellrowborder" valign="top" width="33.31666833316668%" headers="mcps1.3.2.6.2.4.1.2 "><p id="er_01_0063__p1432592819512">Enterprise Router</p>
</td>
<td class="cellrowborder" valign="top" width="33.36666333366664%" headers="mcps1.3.2.6.2.4.1.3 "><p id="er_01_0063__p732520280514">Static route (custom)</p>
</td>
@ -151,7 +151,7 @@
</thead>
<tbody><tr id="er_01_0063__row1344013379228"><td class="cellrowborder" rowspan="4" valign="top" width="12.572514502900582%" headers="mcps1.3.3.2.2.1.1.2.8.1.1 "><p id="er_01_0063__p16934115313225">er-test-01</p>
</td>
<td class="cellrowborder" rowspan="4" valign="top" width="11.122224444888976%" headers="mcps1.3.3.2.2.1.1.2.8.1.2 "><p id="er_01_0063__p597073622511">64800</p>
<td class="cellrowborder" rowspan="4" valign="top" width="11.122224444888976%" headers="mcps1.3.3.2.2.1.1.2.8.1.2 "><p id="er_01_0063__p73426175619">64800</p>
</td>
<td class="cellrowborder" rowspan="4" valign="top" width="14.652930586117222%" headers="mcps1.3.3.2.2.1.1.2.8.1.3 "><p id="er_01_0063__p14934853142216">Enable</p>
</td>
@ -161,16 +161,16 @@
</td>
<td class="cellrowborder" rowspan="4" valign="top" width="15.413082616523303%" headers="mcps1.3.3.2.2.1.1.2.8.1.6 "><p id="er_01_0063__p15934145392212">Default route table</p>
</td>
<td class="cellrowborder" valign="top" width="15.413082616523303%" headers="mcps1.3.3.2.2.1.1.2.8.1.7 "><p id="er_01_0063__p510314352319">er-attach-01</p>
<td class="cellrowborder" valign="top" width="15.413082616523303%" headers="mcps1.3.3.2.2.1.1.2.8.1.7 "><p id="er_01_0063__p131600262818">er-attach-01</p>
</td>
</tr>
<tr id="er_01_0063__row1131921022314"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.1.1.2.8.1.1 "><p id="er_01_0063__p7320161052311">er-attach-02</p>
<tr id="er_01_0063__row232554632714"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.1.1.2.8.1.1 "><p id="er_01_0063__p4325114618278">er-attach-02</p>
</td>
</tr>
<tr id="er_01_0063__row0388165822310"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.1.1.2.8.1.1 "><p id="er_01_0063__p838855892311">er-attach-03</p>
<tr id="er_01_0063__row196361648182713"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.1.1.2.8.1.1 "><p id="er_01_0063__p963674815276">er-attach-03</p>
</td>
</tr>
<tr id="er_01_0063__row0389125872314"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.1.1.2.8.1.1 "><p id="er_01_0063__p1389185842314">er-attach-04</p>
<tr id="er_01_0063__row128014412715"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.1.1.2.8.1.1 "><p id="er_01_0063__p1080744122710">er-attach-04</p>
</td>
</tr>
</tbody>
@ -251,45 +251,45 @@
</th>
</tr>
</thead>
<tbody><tr id="er_01_0063__row2061194141214"><td class="cellrowborder" valign="top" width="15.03%" headers="mcps1.3.3.2.2.3.1.2.7.1.1 "><p id="er_01_0063__p062164101211">ecs-demo-01</p>
<tbody><tr id="er_01_0063__row2061194141214"><td class="cellrowborder" valign="top" width="15.03%" headers="mcps1.3.3.2.2.3.1.2.7.1.1 "><p id="er_01_0063__p768302816291">ecs-demo-01</p>
</td>
<td class="cellrowborder" rowspan="4" valign="top" width="18.02%" headers="mcps1.3.3.2.2.3.1.2.7.1.2 "><p id="er_01_0063__p7397182471318">Public image:</p>
<p id="er_01_0063__p4397824121313">EulerOS 2.5 6</p>
</td>
<td class="cellrowborder" valign="top" width="17.02%" headers="mcps1.3.3.2.2.3.1.2.7.1.3 "><p id="er_01_0063__p14624417128">vpc-demo-01</p>
<td class="cellrowborder" valign="top" width="17.02%" headers="mcps1.3.3.2.2.3.1.2.7.1.3 "><p id="er_01_0063__p1448223212293">vpc-demo-01</p>
</td>
<td class="cellrowborder" valign="top" width="18.37%" headers="mcps1.3.3.2.2.3.1.2.7.1.4 "><p id="er_01_0063__p1762174111124">subnet-demo-01</p>
<td class="cellrowborder" valign="top" width="18.37%" headers="mcps1.3.3.2.2.3.1.2.7.1.4 "><p id="er_01_0063__p7919134172913">subnet-demo-01</p>
</td>
<td class="cellrowborder" rowspan="4" valign="top" width="16.950000000000003%" headers="mcps1.3.3.2.2.3.1.2.7.1.5 "><p id="er_01_0063__p673211485131">sg-demo (general-purpose web server)</p>
</td>
<td class="cellrowborder" valign="top" width="14.610000000000001%" headers="mcps1.3.3.2.2.3.1.2.7.1.6 "><p id="er_01_0063__p176214141210">192.168.1.12</p>
<td class="cellrowborder" valign="top" width="14.610000000000001%" headers="mcps1.3.3.2.2.3.1.2.7.1.6 "><p id="er_01_0063__p1629123762914">192.168.1.12</p>
</td>
</tr>
<tr id="er_01_0063__row174161047317"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.1 "><p id="er_01_0063__p164161247317">ecs-demo-02</p>
<tr id="er_01_0063__row380013716296"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.1 "><p id="er_01_0063__p207351130192919">ecs-demo-02</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.2 "><p id="er_01_0063__p94161147219">vpc-demo-02</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.2 "><p id="er_01_0063__p12483232192913">vpc-demo-02</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.3 "><p id="er_01_0063__p54161471119">subnet-demo-02</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.3 "><p id="er_01_0063__p1580015720293">subnet-demo-02</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.4 "><p id="er_01_0063__p341614713110">172.16.1.189</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.4 "><p id="er_01_0063__p0801137112916">172.16.1.189</p>
</td>
</tr>
<tr id="er_01_0063__row174166471812"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.1 "><p id="er_01_0063__p541618479115">ecs-demo-03</p>
<tr id="er_01_0063__row161763692915"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.1 "><p id="er_01_0063__p111761615296">ecs-demo-03</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.2 "><p id="er_01_0063__p2416347112">vpc-demo-03</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.2 "><p id="er_01_0063__p101761765293">vpc-demo-03</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.3 "><p id="er_01_0063__p54163471119">subnet-demo-03</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.3 "><p id="er_01_0063__p517636152918">subnet-demo-03</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.4 "><p id="er_01_0063__p741618475110">10.1.1.105</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.4 "><p id="er_01_0063__p3176126152919">10.1.1.105</p>
</td>
</tr>
<tr id="er_01_0063__row241618471514"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.1 "><p id="er_01_0063__p154161471312">ecs-demo-04</p>
<tr id="er_01_0063__row10468335292"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.1 "><p id="er_01_0063__p6683142802912">ecs-demo-04</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.2 "><p id="er_01_0063__p20416647515">vpc-demo-04</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.2 "><p id="er_01_0063__p446853182910">vpc-demo-04</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.3 "><p id="er_01_0063__p2416547519">subnet-demo-04</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.3 "><p id="er_01_0063__p64681632297">subnet-demo-04</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.4 "><p id="er_01_0063__p54166472116">10.2.1.83</p>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.1.2.7.1.4 "><p id="er_01_0063__p646818313291">10.2.1.83</p>
</td>
</tr>
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<td class="cellrowborder" valign="top" width="59.84598459845984%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0064__p362984115920">Enter an ASN based on your network plan. It cannot be changed after the enterprise router is created.</p>
<p id="er_01_0064__p12673953163619">Default ASN: 64800</p>
</td>
<td class="cellrowborder" valign="top" width="22.41224122412241%" headers="mcps1.3.2.2.5.2.1.2.4.1.3 "><p id="er_01_0064__p597073622511">64800</p>
<td class="cellrowborder" valign="top" width="22.41224122412241%" headers="mcps1.3.2.2.5.2.1.2.4.1.3 "><p id="er_01_0064__p183774305510">64800</p>
</td>
</tr>
<tr id="er_01_0064__row14429124613579"><td class="cellrowborder" valign="top" width="17.741774177417742%" headers="mcps1.3.2.2.5.2.1.2.4.1.1 "><p id="er_01_0064__p1942934613577">Default Route Table Association</p>

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<h1 class="topictitle1">Step 3: (Optional) Create VPCs and ECSs</h1>
<div id="body0000001194852941"><p id="er_01_0065__p64041011551">Perform the following operations to create VPCs and ECSs. If you already have VPCs and ECS, skip this step.</p>
<div class="section" id="er_01_0065__section72621827154518"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0065__ul136625364459"><li id="er_01_0065__li166213366456">The CIDR blocks of the VPCs to be connected cannot overlap with each other.<p id="er_01_0065__er_01_0063_p79781107399"><a name="er_01_0065__li166213366456"></a><a name="li166213366456"></a>In this example, the CIDR blocks of the VPCs are propagated to the enterprise router route table as the destination in routes. The CIDR blocks cannot be modified and overlapping CIDR blocks may cause route conflicts.</p>
<div class="section" id="er_01_0065__section72621827154518"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0065__ul136625364459"><li id="er_01_0065__li166213366456">The CIDR blocks of the VPCs to be connected cannot overlap with each other.<p id="er_01_0065__er_01_0063_p79781107399"><a name="er_01_0065__li166213366456"></a><a name="li166213366456"></a>In this example, the CIDR blocks of the VPCs are propagated to the enterprise router route table as the destination in routes. The CIDR blocks cannot be modified and overlapping CIDR blocks may cause route conflicts.</p>
<p id="er_01_0065__er_01_0063_p175454413356">If your existing VPCs have overlapping CIDR blocks, do not use propagated routes. Instead, you need to manually add static routes to the route table of the enterprise router. The destination can be VPC subnet CIDR blocks or smaller ones.</p>
</li><li id="er_01_0065__li884518238203">Four ECSs must be in the same security group. If your ECSs are in different security groups, add rules to their security groups to allow access to each other.</li></ul>
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<div id="body0000001181090605"><p id="er_01_0067__p8734113614438">Perform the following operations to configure the routes for the enterprise router in the VPC route table:</p>
<div class="note" id="er_01_0067__note1270820298563"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="er_01_0067__ul314619351536"><li id="er_01_0067__er_01_0062_li014613351436">If you enable <strong id="er_01_0067__er_01_0062_b57646433126">Auto Add Routes</strong> when creating a VPC attachment, you do not need to manually add static routes to the VPC route table. Instead, the system automatically adds routes (with this enterprise router as the next hop and 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as the destinations) to all route tables of the VPC.</li><li id="er_01_0067__er_01_0062_li7439651794">If an existing route in the VPC route tables has a destination to 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16, the routes will fail to be added. In this case, do not enable <strong id="er_01_0067__er_01_0062_b23301648201210">Auto Add Routes</strong>. After the attachment is created, manually add routes.</li></ul>
</div></div>
<div class="section" id="er_01_0067__section292234514349"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0067__ul131131281209"><li id="er_01_0067__li141136286020">If your VPC only has a default route table, all subnets in it are associated with the default route table. You only need to add routes to the default route table for traffic to route through the enterprise router.</li><li id="er_01_0067__li1111316281607">If your VPC has multiple custom route tables and different subnets in the VPC are associated with different route tables, you need to add routes to each route table associated with the subnets for traffic to route through the enterprise router.</li></ul>
<div class="section" id="er_01_0067__section292234514349"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0067__ul131131281209"><li id="er_01_0067__li141136286020">If your VPC only has a default route table, all subnets in it are associated with the default route table. You only need to add routes to the default route table for traffic to route through the enterprise router.</li><li id="er_01_0067__li1111316281607">If your VPC has multiple custom route tables and different subnets in the VPC are associated with different route tables, you need to add routes to each route table associated with the subnets for traffic to route through the enterprise router.</li></ul>
</div>
<div class="section" id="er_01_0067__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0067__ol11464202427"><li id="er_01_0067__li74960206513"><span>Log in to the management console.</span></li><li id="er_01_0067__li18272154101917"><span>Click <span><img id="er_01_0067__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0067__li13278035192013"><span>Click <strong id="er_01_0067__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0067__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0067__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0067__er_01_0064_p131231735172115">The <strong id="er_01_0067__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0067__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0067__er_01_0070_fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0067__er_01_0070_er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>

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</td>
<td class="cellrowborder" valign="top" width="59.27592759275928%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0069__p0209172153117">Mandatory</p>
<p id="er_01_0069__p1820919213115">Select an enterprise project that the enterprise router will be added to.</p>
<p id="er_01_0069__p520919211314">An enterprise project facilitates project-level management and grouping of cloud resources and users. The default project is <strong id="er_01_0069__b1749038337">default</strong>.</p>
<p id="er_01_0069__p520919211314">An enterprise project facilitates project-level management and grouping of cloud resources and users. The default project is <strong id="er_01_0069__b1822624702">default</strong>.</p>
</td>
<td class="cellrowborder" valign="top" width="22.5022502250225%" headers="mcps1.3.2.2.5.2.1.2.4.1.3 "><p id="er_01_0069__p11131124017455">default</p>
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<h1 class="topictitle1">Creating a VPC Attachment</h1>
<div id="body0000001152745484"><div class="section" id="er_01_0070__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0070__p8734113614438">This section describes how to attach a VPC to an enterprise router so that the VPCs attached to the enterprise router can communicate with each other.</p>
</div>
<div class="section" id="er_01_0070__section292234514349"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0070__ul1460012431441"><li id="er_01_0070__li1600124317442">If you use the propagated routes of a VPC attachment, the route table of the enterprise router automatically learns the VPC CIDR block as the destination of routes. The CIDR block cannot be changed. To ensure that routes in the route table do not conflict, the CIDR blocks of all VPCs attached to the enterprise router cannot overlap. Otherwise, communication fails.</li><li id="er_01_0070__li1387055114412">If your existing VPCs have overlapping CIDR blocks, do not use propagated routes. Instead, manually add static routes to the route table of the enterprise router. The destination of the routes can be VPC subnet CIDR blocks or smaller ones.</li></ul>
<div class="section" id="er_01_0070__section292234514349"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0070__ul1460012431441"><li id="er_01_0070__li1600124317442">If you use the propagated routes of a VPC attachment, the route table of the enterprise router automatically learns the VPC CIDR block as the destination of routes. The CIDR block cannot be changed. To ensure that routes in the route table do not conflict, the CIDR blocks of all VPCs attached to the enterprise router cannot overlap. Otherwise, communication fails.</li><li id="er_01_0070__li1387055114412">If your existing VPCs have overlapping CIDR blocks, do not use propagated routes. Instead, manually add static routes to the route table of the enterprise router. The destination of the routes can be VPC subnet CIDR blocks or smaller ones.</li></ul>
</div>
<div class="section" id="er_01_0070__section9912142320339"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0070__ol11464202427"><li id="er_01_0070__li1260341445218"><span>Log in to the management console.</span></li><li id="er_01_0070__li18272154101917"><span>Click <span><img id="er_01_0070__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0070__li13278035192013"><span>Click <strong id="er_01_0070__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0070__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0070__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0070__er_01_0064_p131231735172115">The <strong id="er_01_0070__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0070__li6322510553"><span>Search for the target enterprise router by name.</span><p><div class="fignone" id="er_01_0070__fig2034013312252"><span class="figcap"><b>Figure 1 </b>Searching for an enterprise router</span><br><span><img id="er_01_0070__er_01_0016_image1553618920257" src="en-us_image_0000001674900098.png"></span></div>
@ -40,7 +40,7 @@
<tr id="er_01_0070__row184481211104110"><td class="cellrowborder" valign="top" width="17.37173717371737%" headers="mcps1.3.3.2.7.2.1.2.4.1.1 "><p id="er_01_0070__p10449811144113">Attached Resource</p>
</td>
<td class="cellrowborder" valign="top" width="59.67596759675967%" headers="mcps1.3.3.2.7.2.1.2.4.1.2 "><p id="er_01_0070__p114491611134114">Mandatory</p>
<ol type="a" id="er_01_0070__ol163081848174111"><li id="er_01_0070__li12459103216151">Select the VPC to be attached to the enterprise router. You can enter a VPC name to quickly find the target VPC.</li><li id="er_01_0070__li1430814812416">Select a subnet in the selected VPC. You can enter a subnet name to quickly find the target subnet.<ul id="er_01_0070__ul13084489415"><li id="er_01_0070__li45812148616">You can select any subnet in the VPC. All subnets in the same VPC can communicate with each other by default and the enterprise router can connect to the entire VPC.</li><li id="er_01_0070__li630810481414">You are advised to select a subnet that is dedicated for connecting to the enterprise router. To ensure that the subnet has enough IP addresses for the system and the enterprise router, make the subnet mask /28 or smaller.</li></ul>
<ol type="a" id="er_01_0070__ol163081848174111"><li id="er_01_0070__li12459103216151">Select the VPC to be attached to the enterprise router. You can enter a VPC name to quickly find the target VPC.</li><li id="er_01_0070__li1430814812416">Select a subnet in the selected VPC. You can enter a subnet name to quickly find the target subnet.<ul id="er_01_0070__ul13084489415"><li id="er_01_0070__li45812148616">You can select any subnet in the VPC. All subnets in the same VPC can communicate with each other by default and the enterprise router can connect to the entire VPC.</li><li id="er_01_0070__li630810481414">You are advised to select a subnet that is dedicated for connecting to the enterprise router. To ensure that the subnet has enough IP addresses for the system and the enterprise router, make the subnet mask /28 or smaller.</li><li id="er_01_0070__li727644019559">The traffic from the enterprise router to the VPC will be routed based on the VPC route table associated with the subnet.</li></ul>
</li></ol>
</td>
<td class="cellrowborder" valign="top" width="22.952295229522953%" headers="mcps1.3.3.2.7.2.1.2.4.1.3 "><ul id="er_01_0070__ul1440115194218"><li id="er_01_0070__li1041718134165">VPC: vpc-A</li><li id="er_01_0070__li104175133167">Subnet: subnet-A01</li></ul>

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