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zhoumeng
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Reviewed-by: Hajba, László Antal <laszlo-antal.hajba@t-systems.com> Co-authored-by: zhoumeng <zhoumeng35@huawei.com> Co-committed-by: zhoumeng <zhoumeng35@huawei.com>
72 lines
4.5 KiB
HTML
72 lines
4.5 KiB
HTML
<a name="elb_faq_210409"></a><a name="elb_faq_210409"></a>
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<h1 class="topictitle1">Why Can't I Select the Target Backend Server Group When Adding or Modifying a Listener?</h1>
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<div id="body0000001145044196"><p id="elb_faq_210409__p8060118">The backend server group's protocol (backend protocol) you want to select is not supported by the listener protocol (frontend protocol). There are some constraints on the backend protocol when you associate a backend server group with a listener.</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="elb_faq_210409__table158021438173312" width="100%" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Frontend and backend protocols of dedicated load balancers</caption><thead align="left"><tr id="elb_faq_210409__row1580353819330"><th align="left" class="cellrowborder" valign="top" width="40.36%" id="mcps1.3.2.2.3.1.1"><p id="elb_faq_210409__p1480319381335">Frontend Protocol</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="59.64%" id="mcps1.3.2.2.3.1.2"><p id="elb_faq_210409__p6803193816339">Backend Protocol</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="elb_faq_210409__row1480333819339"><td class="cellrowborder" valign="top" width="40.36%" headers="mcps1.3.2.2.3.1.1 "><p id="elb_faq_210409__p12803133816336">TCP</p>
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</td>
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<td class="cellrowborder" valign="top" width="59.64%" headers="mcps1.3.2.2.3.1.2 "><p id="elb_faq_210409__p158039381334">TCP</p>
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</td>
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</tr>
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<tr id="elb_faq_210409__row1680311388338"><td class="cellrowborder" valign="top" width="40.36%" headers="mcps1.3.2.2.3.1.1 "><p id="elb_faq_210409__p480363813335">UDP</p>
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</td>
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<td class="cellrowborder" valign="top" width="59.64%" headers="mcps1.3.2.2.3.1.2 "><p id="elb_faq_210409__p18031838123312">UDP/QUIC</p>
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</td>
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</tr>
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<tr id="elb_faq_210409__row4634173915342"><td class="cellrowborder" valign="top" width="40.36%" headers="mcps1.3.2.2.3.1.1 "><p id="elb_faq_210409__p363523963411">HTTP</p>
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</td>
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<td class="cellrowborder" valign="top" width="59.64%" headers="mcps1.3.2.2.3.1.2 "><p id="elb_faq_210409__p3635163923414">HTTP</p>
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</td>
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</tr>
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<tr id="elb_faq_210409__row118036384336"><td class="cellrowborder" valign="top" width="40.36%" headers="mcps1.3.2.2.3.1.1 "><p id="elb_faq_210409__p5803183843312">HTTPS</p>
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</td>
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<td class="cellrowborder" valign="top" width="59.64%" headers="mcps1.3.2.2.3.1.2 "><p id="elb_faq_210409__p48031038123313">HTTP/HTTPS</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="elb_faq_210409__table72272618376" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Frontend and backend protocols of shared load balancers</caption><thead align="left"><tr id="elb_faq_210409__row112283617377"><th align="left" class="cellrowborder" valign="top" width="40.31%" id="mcps1.3.3.2.3.1.1"><p id="elb_faq_210409__p32281368378">Frontend Protocol</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="59.69%" id="mcps1.3.3.2.3.1.2"><p id="elb_faq_210409__p122291761373">Backend Protocol</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="elb_faq_210409__row18229269376"><td class="cellrowborder" valign="top" width="40.31%" headers="mcps1.3.3.2.3.1.1 "><p id="elb_faq_210409__p722914623718">TCP</p>
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</td>
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<td class="cellrowborder" valign="top" width="59.69%" headers="mcps1.3.3.2.3.1.2 "><p id="elb_faq_210409__p568635243911">TCP</p>
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</td>
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</tr>
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<tr id="elb_faq_210409__row22291763376"><td class="cellrowborder" valign="top" width="40.31%" headers="mcps1.3.3.2.3.1.1 "><p id="elb_faq_210409__p82299614375">UDP</p>
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</td>
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<td class="cellrowborder" valign="top" width="59.69%" headers="mcps1.3.3.2.3.1.2 "><p id="elb_faq_210409__p2068655273916">UDP</p>
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</td>
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</tr>
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<tr id="elb_faq_210409__row122913616372"><td class="cellrowborder" valign="top" width="40.31%" headers="mcps1.3.3.2.3.1.1 "><p id="elb_faq_210409__p1322917623714">HTTP</p>
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</td>
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<td class="cellrowborder" valign="top" width="59.69%" headers="mcps1.3.3.2.3.1.2 "><p id="elb_faq_210409__p368618524395">HTTP</p>
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</td>
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</tr>
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<tr id="elb_faq_210409__row822926143712"><td class="cellrowborder" valign="top" width="40.31%" headers="mcps1.3.3.2.3.1.1 "><p id="elb_faq_210409__p42291693711">HTTPS</p>
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</td>
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<td class="cellrowborder" valign="top" width="59.69%" headers="mcps1.3.3.2.3.1.2 "><p id="elb_faq_210409__p156866524399">HTTP</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="elb_faq_0202.html">Listeners</a></div>
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</div>
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</div>
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