• Only a secondary IP address can be released from an ENI. The primary IP address cannot be released.
• After a private IP address is unbound, the associated EIP will be unbound automatically.

1. Log in to the VPC Console.
2. Choose IP and ENI -> ENI in the left sidebar to go to the ENI list page.
3. Locate the ENI you want to release secondary private IPs, and click its ID/Name to go to the details page.
4. Click the IPv4 address management tab to view private IP addresses and EIPs that have been bound.
   
5. Locate the private IP address you want to release, and click Release under the Operation column.
6. Click OK in the pop-up window.