<p>This article describes how to create a TCP listener for a classic ELB instance.</p> <p><strong><span style="font-size:18px">Prerequisites</span></strong></p> <p>You have successfully created a classic ELB instance.</p> <p><strong><span style="font-size:18px">Procedures</span></strong></p> <p>1.&nbsp;Log in to the <a href="https://pinganyun.com/console/loadBalance/overview" target="_blank">ELB Console</a>.</p> <p>2.&nbsp;In the left navigation pane, click <strong>Instance Management (Classic)</strong>.</p> <p>3. On the <strong>Instance Management</strong> <strong>(Classic)</strong> page, click the instance name of the target ELB instance.</p> <p>4.&nbsp;On the <strong>Instance Information</strong> page, click the <strong>Listener</strong> tab.</p> <p>5.&nbsp;In the upper-right corner of the tab, click <strong>Create</strong>.</p> <p>6.&nbsp;On the <strong>Create Listener</strong> page, create a listener as described in the following tables:</p> <p><img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20201607114721-1fa418239d17.png" style="height:436px; width:830px" /></p> <p><strong>Basic Information</strong></p> <table border="1" cellpadding="0" cellspacing="0" style="width:0px"> <tbody> <tr> <td style="background-color:#ededed; width:229px"> <p><strong>Configuration item</strong></p> </td> <td style="background-color:#ededed; vertical-align:top; width:552px"> <p><strong>Description</strong></p> </td> </tr> <tr> <td style="width:229px"> <p>Description</p> </td> <td style="vertical-align:top; width:552px"> <p>Enter a description for&nbsp;the&nbsp;listener.</p> </td> </tr> <tr> <td style="width:229px"> <p>Frontend protocol</p> </td> <td style="vertical-align:top; width:552px"> <p>Select TCP.</p> </td> </tr> <tr> <td style="width:229px"> <p>Port</p> </td> <td style="vertical-align:top; width:552px"> <p>Enter number of the port that receives the requests and forward them to the server resource pool.</p> <p><img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20201607114834-1f145ba09dda.png" style="height:20px; margin:1px; width:50px" /><strong>:</strong>&nbsp; The number of each listerner port in the same ELB instance must be unique.</p> </td> </tr> <tr> <td style="width:229px"> <p>Backend protocol</p> </td> <td style="vertical-align:top; width:552px"> <p>TCP is selected by default.</p> </td> </tr> <tr> <td style="width:229px"> <p>Pool</p> </td> <td style="vertical-align:top; width:552px"> <p>Select a server resource pool.</p> <p>You need to select a pool based on the following steps:</p> <p>1.&nbsp;Click <strong>Choose Pool</strong>, and the <strong>Choose Pool</strong> dialog box opens.</p> <p>2.&nbsp;Check the target pool, and click <strong>Confirm</strong>.</p> <p>If you have not yet created a pool, you need to create one before you can make a selection here. You can also create a server resource pool before you select one for a listener For more information about creating a pool, see Create a Pool.</p> </td> </tr> </tbody> </table> <p><strong>Advanced configuration</strong></p> <table border="1" cellpadding="0" cellspacing="0" style="width:0px"> <tbody> <tr> <td style="background-color:#ededed; width:229px"> <p><strong>Configuration item</strong></p> </td> <td style="background-color:#ededed; vertical-align:top; width:552px"> <p><strong>Description</strong></p> </td> </tr> <tr> <td style="width:229px"> <p>Session persistence</p> </td> <td style="vertical-align:top; width:552px"> <p>You can choose to turn on or off the session persistence function. After you turn on the session persistence function, requests belonging to the same session will be forwarded to the same host for processing.</p> <p>The way to keep the session is the source address hash SOURCE_ADDRESS.</p> </td> </tr> </tbody> </table> <p>7.&nbsp;Click <strong>Create</strong>, and you will see an <strong>Operation succeeded</strong> message at the bottom of the page.&nbsp;</p>