Help Center/ Cloud Search Service/ FAQs/ Managing CSS Clusters/ 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.
  1. Log in to the CSS management console.
  2. In the navigation pane on the left, expand Clusters. Select a cluster type based on the target cluster. The cluster list is displayed.
  3. In the cluster list, click the name of the target cluster. The cluster information page is displayed.
  4. Click the Overview tab.
  5. 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
  6. Click OK after you change the subnet.