Note:
- Only the primary network interface can have its subnet modified.
- Before you change the subnet, please unbind all secondary IPs.
- The subnet can only be changed to another subnet in the same availability zone.
Log in to the VPC console and click ENI in the left directory to open the Elastic Network Interface list page.
Click the instance ID you want to view to open the details page. Click IP Management in the tab and click Change Subnet next to the corresponding subnet.

3. In the pop-up box, select the subnet that needs to be replaced and specify the new primary IP.

4. Click OK.