If your ECS instance is assigned a public IP address, you can change the IP address within six hours after the instance is created regardless of whether the instance is in a classic network or in a VPC network.

Limits

  • You can change the public IP address of an instance a maximum of three times.
  • Changes to a public IP address must be made within six hours after the corresponding instance is created.

Prerequisites

  • The instance must be in the Stopped state. For information about how to start or stop an instance, see Start or stop an instance.
  • The instance must be assigned a public IP address. You can view the IP address in the IP Address column of the Instance List in the ECS console.

Procedure

To change the public IP address, follow these steps:

  1. Log on to the ECS console.
  2. In the left-side navigation pane, choose Instances & Images > Instances.
  3. Find the target instance and then choose More > Network and Security Group > Change Public IP Address in the Actions column.

  4. Click Start Now.

    A new public IP address is displayed.

  5. Click OK.

FAQ

  • Can I change the public IP address of an instance if it was created more than six hours ago?
    • For instances in a VPC network, the public IP address can be converted into an Elastic IP Address (EIP). For information about how to convert the IP address, see Convert public IP address to EIP address.
    • For instances in a classic network, the public IP address cannot be changed if an instance has been created for more than six hours.
  • Why is the Change Public IP Address option under Network and Security Group not displayed?
    • By default, the Change Public IP Address option is not displayed for instances that were created more than six hours ago.
    • If you enable the no fees for stopped VPC instances feature for an instance, make sure that this feature is disabled when you stop the instance. Otherwise, the instance will be temporarily released and the Change Public IP Address option is not displayed. You can disable this feature by selecting the Keep Stopped Instances and Continue Billing check box in the Stop dialog box.

  • Can I change the private IP address of an instance?
    • This operation is allowed for instances in a VPC network. For information about how to change the private IP address, see Change the private IP of an ECS instance.
    • This operation is not allowed for instances in a classic network.
  • How do I obtain the public IP address of a created instance if the IP address is not assigned during instance creation?
    • For a Subscription instance, you can obtain the public IP address by upgrading or downgrading the network bandwidth configuration. For more information, see Overview of configuration changes.
    • For a Pay-As-You-Go instance, you cannot obtain the public IP address after the instance is created. You can only bind an EIP address.