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Load Balancer

Backend Server Group

Creating a server group

Creating a server group

This topic introduces how to create a backend server group.

Action description

The project associated with a backend server group defaults to the same project as the Classic Load Balancer (CLB) instance it belongs to.

After enabling the IP-type backend server group feature, only newly created instances currently support creating an IP-type backend server group.

A single CLB instance can have up to 20 backend server groups. If the default quota does not meet your needs, please go to Quota Center to increase the corresponding quota.

Procedures

Log in to the CLB console.

In the top menu bar, select the target project and region.

Click the target instance name.

On the Server Group tab, click Create server group.

Configure relevant parameters based on the table below.

Parameter name	Parameter description	Example
Name	Enter the name of backend server group.	rsp01
Topic	Select the type of backend server group. Server type: supports adding only ECS instances in the same VPC as the CLB instance or secondary network interfaces attached to ECS instances as backend servers. IP type: supports adding only IP addresses as backend servers. You can add IP addresses from other VPCs or on-premises IDCs as backend servers, as long as they are network-reachable. tip The IP-type server group feature is currently in beta and only supports trial applications from accounts that have completed enterprise authorization. Contact customer service support for trial access.	Server type
IP version	Protocol type for the backend server's private IP address. IPv4: supports adding only IPv4 backend servers. IPv6: supports adding only IPv6 backend servers. IPv6 is only supported when the CLB instance is dual-stack and the backend server group uses Server-type targets.	IPv4
All-port forwarding	All-port forwarding must be turned on only when the server group needs to associate a listener that listens on all ports. Once enabled, all servers in the group will use all-port forwarding; specifying individual ports is not supported. Applicable to scenarios where a backend server application opens a continuous port range. For more details, please refer to Creating a TCP protocol listener and Creating a UDP protocol listener. tip The listener all-port listening feature is in the beta stage, and currently only supports the accounts that have completed Enterprise Authorization. If you need to use it, please contact your account manager.	Do not enable
Tags	A tag consists of a key-value pair and is used for categorizing and searching resources For more information, see Tag management. Click the add icon, enter the tag key and tag value, and add tags to the server group.	Tag key: rsp-key Tag value: rsp-test

Click OK to complete the action.

What to do next

After creating the server group, you also need to add backend servers to it.

Related documents

CreateServerGroup

Last updated: 2026.06.17 19:25:28