All Products
Search
Document Center

Virtual Private Cloud:CreateTrafficMirrorSession

Last Updated:Aug 28, 2026

Creates a traffic mirror session.

Operation description

CreateTrafficMirrorSession 接口属于异步接口,即系统返回一个实例 ID,但该镜像会话尚未创建成功,系统后台的创建任务仍在进行。您可以调用 ListTrafficMirrorSessions 查询镜像会话的创建状态:

  • 当镜像会话处于 Creating 状态时,表示镜像会话正在创建中。

  • 当镜像会话处于 Created 状态时,表示镜像会话创建完成。

Try it now

Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

Test

RAM authorization

No authorization for this operation. If you encounter issues with this operation, contact technical support.

Request parameters

Parameter

Type

Required

Description

Example

TrafficMirrorSessionDescription

string

No

The description of the traffic mirror session.

The description must be 1 to 256 characters in length and cannot start with http:// or https://.

This is a trafficmirrorsession.

TrafficMirrorSessionName

string

No

The name of the traffic mirror session.

The name must be 1 to 128 characters in length, and cannot start with http:// or https://.

test

ClientToken

string

No

The client token used to ensure the idempotence of the request.

You can use the client to generate the token value, but you must ensure it is unique among all requests. The client token can contain only ASCII characters.

Note

If you do not set this parameter, the system uses RequestId as ClientToken. RequestId might be different for each API request.

0c593ea1-3bea-11e9-b96b-88e9fe63****

DryRun

boolean

No

Whether to perform a dry run. Valid values:

  • true: performs a dry run. The system checks the required parameters, request format, and limits. If the request fails the dry run, an error message is returned. If the request passes the dry run, the DryRunOperation error code is returned.

  • false (default): performs a dry run and sends the request. If the request passes the dry run, the operation is performed.

false

TrafficMirrorTargetId

string

Yes

The ID of the traffic mirror destination. You can specify only an elastic network interface (ENI) or a Server Load Balancer (SLB) instance as a traffic mirror destination.

eni-j6c8znm5l1yt4sox****

TrafficMirrorTargetType

string

Yes

The type of the traffic mirror destination. Valid values:

  • NetworkInterface: an ENI

  • SLB: an SLB instance

NetworkInterface

TrafficMirrorFilterId

string

Yes

The ID of the filter.

tmf-j6cmls82xnc86vtpe****

VirtualNetworkId

integer

No

The VXLAN network identifier (VNI). Valid values: 0 to 16777215.

VNIs identify mirrored traffic from different sessions at the traffic mirror destination. Specify a custom VNI or leave this parameter empty to let the system allocate one randomly.

1

Priority

integer

Yes

The priority of the traffic mirror session. Valid values: 1 to 32766.

A smaller value indicates a higher priority. You cannot specify identical priorities for traffic mirror sessions in the same region under the same account.

1

Enabled

boolean

No

Whether to enable the traffic mirror session. Valid values:

  • false (default): does not enable the traffic mirror session.

  • true: enables the traffic mirror session.

false

PacketLength

integer

No

The maximum transmission unit.

Valid values: 64 to 9600. Default value: 1500.

1500

TrafficMirrorSourceIds

array

Yes

The ID of the traffic mirror source. You can specify only an elastic network interface (ENI) as the traffic mirror source. The default value of N is 1, which indicates that you can add only one traffic mirror source to a traffic mirror session.

eni-j6c2fp57q8rr47rp****

string

No

The ID of the traffic mirror source. You can specify only an ENI as the traffic mirror source. The default value of N is 1, which means that you can add only one traffic mirror source to a traffic mirror session.

eni-j6c2fp57q8rr47rp****

RegionId

string

Yes

The region ID of the traffic mirror session. You can call the DescribeRegions operation to query the most recent region list. For more information about regions that support traffic mirroring, see Overview of traffic mirror.

cn-hongkong

ResourceGroupId

string

No

The resource group ID of the mirrored traffic.

rg-bp67acfmxazb4ph****

Tag

array<object>

No

The tag of the resource.

object

No

The tag of the resource.

Key

string

No

The tag key. You can specify at most 20 tag keys. The tag key cannot be an empty string.

The tag key can be up to 128 characters in length. It cannot start with aliyun or acs:, and cannot contain http:// or https://.

FinanceDept

Value

string

No

The tag value. You can specify at most 20 tag values. The tag value can be an empty string.

The tag value can be up to 128 characters in length. It cannot start with aliyun or acs:, and cannot contain http:// or https://.

FinanceJoshua

Response elements

Element

Type

Description

Example

object

TrafficMirrorSessionId

string

The ID of the traffic mirror session.

tms-j6ce5di4w7nvigfjz****

RequestId

string

The ID of the request.

0ED8D006-F706-4D23-88ED-E11ED28DCAC0

ResourceGroupId

string

The resource group ID of the mirrored traffic.

rg-bp67acfmxazb4ph****

Examples

Success response

JSON format

{
  "TrafficMirrorSessionId": "tms-j6ce5di4w7nvigfjz****",
  "RequestId": "0ED8D006-F706-4D23-88ED-E11ED28DCAC0",
  "ResourceGroupId": "rg-bp67acfmxazb4ph****"
}

Error codes

HTTP status code

Error code

Error message

Description

400 IncorrectBusinessStatus.TrafficMirror The business status of traffic mirror is incorrect. Traffic mirroring is in an invalid state.
400 OptInRequired.TrafficMirror You need to subscribe to the traffic mirror service first. Traffic mirroring is disabled.
400 DuplicatedParam.SourceInstanceIds The parameter of source instance IDs contains duplicate values. Duplicate values are set for TrafficMirrorSourceIds.N.
400 OperationDenied.DuplicateRole The network interface must not be the source and the target of traffic mirror sessions at the same time.
400 ResourceNotFound.NetworkInterface The specified resource of %s is not found. The error message returned because NetworkInterface is set to an invalid value.
400 ResourceNotFound.EcsInstance The specified resource of ECS instance is not found.
400 ResourceNotFound.Slb The specified resource of SLB is not found.
400 OperationDenied.SlbNotInVpc The specified SLB is not in any VPC.
400 ResourceNotFound.TrafficMirrorFilter The specified resource of traffic mirror filter is not found. The specified filter does not exist.
400 IncorrectStatus.TrafficMirrorFilter The status of traffic mirror filter is incorrect. The filter is in an invalid state.
400 OperationDenied.EcsNotSupportTrafficMirror The ECS instance does not support traffic mirroring.
400 QuotaExceeded.SessionNum The quota of the number of traffic mirror sessions is exceeded. The number of traffic mirror sessions has reached the upper limit.
400 QuotaExceeded.FilterRelatedSession The quota of the number of traffic mirror sessions related to one filter is exceeded. The number of traffic mirror sessions associated with the filter has reached the upper limit.
400 QuotaExceeded.SourceNumPerSession The quota of the number of traffic mirror sources per session is exceeded. The number of traffic mirror sources associated with a traffic mirror session has reached the upper limit.
400 QuotaExceeded.NetworkInterfaceRelatedSession The quota of the number of traffic mirror sessions related to one network interface is exceeded. The number of traffic mirror sessions associated with an ENI has reached the upper limit.
400 QuotaExceeded.SlbRelatedSession The quota of the number of traffic mirror sessions related to one SLB is exceeded. The number of traffic mirror sessions associated with an SLB instance has reached the upper limit.
400 UnsupportedRegion The feature is not supported in current region. The feature is not supported in the current region.
400 InvalidLoadBalancerId.NotFound The specified resource of load balancer is not found. The SLB instance does not exist.
400 OperationDenied.FreeNetworkInterface The network interface is not attached to any ECS instance. The ENI is not associated with an ECS instance.
400 OperationDenied.ClassicSLB The operation is not allowed because of ClassicSLB. The error message returned because you cannot perform the operation on a CLB instance.
400 ResourceNotFound.TargetInstance The specified target instance for traffic mirroring is not found. The specified traffic mirror destination does not exist.
400 QuotaExceeded.SourceNumPerTarget The maximum number of traffic mirror sources for a target is exceeded. The number of traffic mirror sources associated with the image exceeds the upper limit.
400 IncorrectStatus.NetworkInterface The status of network interface is incorrect. The status of the ENI is invalid.
400 OperationFailed.NotSupportBizType The specified instance type does not support the operation. The specified instance type does not support the operation.
400 IllegalParam.Priority The specified Priority is illegal or the same as other mirroring sessions. The specified Priority is illegal or identical to another mirroring session
400 OperationDenied.UnsupportedTargetType Traffic mirror target must be SLB if traffic mirror sources contain nat gateway network interface. When a NAT gateway NIC exists in the traffic mirroring source, the traffic mirroring purpose must be SLB type.
400 OperationDenied.TargetTypeNotSupportGatewayLoadBalancerEndpoint Operation denied because of target type can not be GatewayLoadBalancerEndpoint. Gateway-based load balancing endpoints are not supported as traffic mirrors mu d
400 OperationDenied.TargetTypeNotSupportBondEni Operation denied because of target type can not be Bond Network Interface. Operation denied because of target type can not be Bond Network Interface.
400 OperationDenied.InvalidTargetBondEniType The traffic mirroring target does not support the entered bond ENI type. The traffic mirroring target does not support the entered bond ENI type.
400 OperationDenied.InvalidSourceBondEniType The traffic mirroring source does not support the entered bond ENI type. The traffic mirroring source does not support the entered bond ENI type.
400 OperationDenied.TargetTypeNotSupportTrafficMirrorFullPacket The traffic mirror session target type does not support the feature of mirroring source full packet. The traffic mirror session target type does not support the feature of mirroring source full packet
400 OperationDenied.TrafficMirrorSessionSourceFullPacketNotSupport The traffic mirror session does not support the feature of mirroring source full packet. Traffic mirror currently does not support source full packet mirroring. TrafficMirrorSourceTruncateMode can only be set to 0, which is the default mode.
400 QuotaExceeded.SessionNumPerTarget The quota of the number of traffic mirror sessions per target is exceeded.
400 OperationDenied.NotSupportBondEniAsTrafficMirrorSource The operation is not allowed because bond eni cannot be the source of traffic mirror. Bond eni is not allowed to be the source of traffic mirror.
400 IncorrectStatus.TrafficMirrorSessionTarget The status of the target of the traffic mirror session is incorrect. The status of the intent of the traffic mirroring session is incorrect.
404 ResourceNotFound.GatewayLoadBalancerEndpoint GatewayLoadBalancerEndpoint instance not found. GatewayLoadBalancerEndpoint instance not found.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.