Updated on 2025-08-01 GMT+08:00

Associating a Route Table with a Subnet

Scenarios

After a subnet is created, the system associates the subnet with the default route table of its VPC. If you want to use specific routes for a subnet, you can associate the subnet with a custom route table.

The custom route table associated with a subnet affects only the outbound traffic. The default route table determines the inbound traffic.

After a route table is associated with a subnet, the routes in the route table control the routing for the subnet and apply to all cloud resources in the subnet.

Notes and Constraints

  • A subnet must have a route table associated and can only be associated with one route table.
  • A route table can be associated with multiple subnets.

Procedure

  1. Go to the route table list page.
  2. In the route table list, locate the row that contains the target route table and click Associate Subnet in the Operation column.
  3. Select the subnet to be associated.
  4. Click OK.