Each subnet must be associated with one route table, which is used to control the outbound traffic direction of the subnet. You can change the subnet's associated route table on the Subnet page in the VPC console as needed. If you need to create a route table, see Creating Custom Route Tables.
Impact on the System
After the route table is replaced by a new one, all instances in the subnet will apply the new route table policy. Please carefully evaluate the business impact.
2. Click Subnets on the left sidebar to access the subnet management page.
3. There are two methods to change the route table associated with the subnet.
Click More > Change route table in the operation column on the right of the subnet that needs to change the route table.
Click the ID of the subnet that needs to change the route table to go to the details page, switch to the Routing rules tab, and click Change route table.
4. In the Change route table pop-up window, select a new route table in the drop-down list, confirm the impact on your business, and click Confirm.
