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<p>1．When ECS instances communicate with ECS instances, it is suggested that</p> <ul> <li>NIC0s communicate with each other and NIC1s communicate with each other.</li> <li>NIC0s should be in the same DMZ network and subnet, and NIC1s should be in the same SF network and subnet.</li> </ul> <p><strong>Note</strong>: When two NIC1s are not in the same subnet, a route needs to be configured for communication.</p> <p>2．It is suggested that you adopt the standard method shown below.</p> <p><img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20200707143047-11b4fbfb9c27.png" style="height:361px; width:600px" /></p> <p>3．This article illustrates the process with the following topology.&nbsp;</p> <p><img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20200707143103-10fc3f899e55.png" style="height:405px; width:600px" /></p>
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