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Can I Expand the Subnet for an Elasticsearch or OpenSearch Cluster?
Updated on 2025-09-04 GMT+08:00
Can I Expand the Subnet for an Elasticsearch or OpenSearch Cluster?
If the current subnet of an existing Elasticsearch or OpenSearch cluster cannot meet your requirements, you can switch to another subnet.

- After switching the subnet, the new subnet is used for adding nodes, including scaling, adding dedicated master/client nodes, and enabling VPC Endpoint. IP addresses will be allocated to newly added nodes from the new subnet.
- A cluster can be associated with a maximum of two subnets.
- Subnet switching does not affect the network settings of existing nodes.
- Log in to the CSS management console.
- In the navigation pane on the left, expand Clusters. Select a cluster type based on the target cluster. The cluster list is displayed.
- In the cluster list, click the name of the target cluster. The cluster information page is displayed.
- Click the Overview tab.
- Click Change Subnet on the right of Current Subnet. In the displayed dialog box, select a new subnet. If there are no subnets that meet your requirements, click Create Subnet to go to the networking service console to create a new subnet.
Figure 1 Switching to another subnet
- Click OK after you change the subnet.
Parent topic: Managing CSS Clusters
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