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Elastic Compute Service:UnassignPrivateIpAddresses

Last Updated:Apr 11, 2024

Unassigns one or more secondary private IP addresses from an elastic network interface (ENI).

Operation description

Usage notes

  • The ENI from which to unassign secondary private IP addresses must be in the Available (Available) or Bound (InUse) state.

  • If the ENI is a primary ENI, the Elastic Compute Service (ECS) instance to which the ENI is attached must be in the Running (Running) or Stopped (Stopped) state.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Authorization information

There is currently no authorization information disclosed in the API.

Request parameters


The region ID of the ENI. You can call the DescribeRegions operation to query the most recent region list.


The ID of the ENI.


Secondary private IP address N to unassign. Valid values of N: 1 to 32.


Secondary private IP address N to unassign. Valid values of N: 1 to 32.


IPv4 prefix N. Valid values of N: 1 to 10.


IPv4 prefix N. Valid values of N: 1 to 10.


Response parameters


The ID of the request.



Sample success responses


  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E"

Error codes

HTTP status codeError codeError messageDescription
400UnsupportedParameter%sThe parameter is not supported.
400InvalidParameter%sThe specified parameter is invalid.
400InvalidInstanceID.Malformed%sThe specified InstanceId parameter is invalid.
400MissingParameter%sA parameter is not specified.
400Forbidden.RegionId%sThe service is unavailable in the current region.
400InvalidAction%sThe operation is invalid.
400InvalidEniId.MalformedThe specified parameter "EniId" is not valid.-
400InvalidParameter.Conflict%sThe specified parameter is invalid. Check whether parameter conflicts exist. %s is a variable. An error message is dynamically returned based on call conditions.
403InvalidUserType.NotSupported%sYour account does not support this operation.
403Abs.InvalidAccount.NotFound%sYour Alibaba Cloud account does not exist or your AccessKey pair has expired.
403Forbidden.NotSupportRAM%sRAM users are not authorized to perform this operation.
403Forbidden.SubUser%sYou are not authorized to manage this resource. Contact the owner of the Alibaba Cloud account for authorization.
403MaxEniCountExceeded%sThe maximum number of ENIs that can be managed has been reached.
403EniPerInstanceLimitExceeded%sThe maximum number of ENIs that can be attached to the specified instance has been reached.
403InvalidOperation.AvailabilityZoneMismatch%sThe operation is invalid.
403InvalidOperation.VpcMismatch%sThe operation is invalid. Check whether the VPC in the operation corresponds to other parameters.
403InvalidSecurityGroupId.NotVpc%sThe specified SecurityGroupId parameter is invalid and the network type of the security group is not VPC.
403InvalidVSwitchId.IpInvalid%sThe specified private IP address is invalid.
403InvalidIp.IpUnassigned%sThe specified IP address is not assigned.
403Operation.Conflict%sThis operation conflicts with another operation in progress. Try again later.
403InvalidOperation.EniServiceManaged%sThe operation is invalid.
403InvalidIp.IpPrefixMaskInvalidThe ip prefixes mask %s is illegal which must be between %s and %s.The IP address prefix mask is invalid and is not within the valid range.
403InvalidIp.IpPrefixMaskNotSameThe ip prefixes %s are illegal which mask must be same.The IP address prefix masks are not the same.
403InvalidIp.IpPrefixNotStrictThe ip prefix must be strict cidr format.The IP address prefix is invalid and is not in the CIDR format.
403InvalidIp.IpPrefixIllegalThe ip prefixes %s is/are illegal.The IP address prefix is invalid and is not in the CIDR format.
403MissingParameterThese parameters %s cannot be both empty.A required parameter is not specified. The required parameters cannot be empty.
404InvalidEcsId.NotFound%sThe specified instance ID does not exist.
404InvalidEniId.NotFound%sThe specified ENI ID does not exist.
404InvalidVSwitchId.NotFound%sThe specified vSwitch does not exist.
404InvalidSecurityGroupId.NotFound%sThe specified security group ID does not exist.
404InvalidInstanceId.NotFound%sThe specified instance does not exist. Check whether the InstanceId parameter is valid.
500InvalidOperation.RegionNotSupportIpPrefixThe current region does not support ip prefix.You cannot assign IP address prefixes in this region.

For a list of error codes, visit the Service error codes.

Change history

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