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[ aws . ec2 ]



Associates the specified subnets and transit gateway attachments with the specified transit gateway multicast domain.

The transit gateway attachment must be in the available state before you can add a resource. Use DescribeTransitGatewayAttachments to see the state of the attachment.

See also: AWS API Documentation


--transit-gateway-multicast-domain-id <value>
--transit-gateway-attachment-id <value>
--subnet-ids <value>
[--dry-run | --no-dry-run]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]
[--endpoint-url <value>]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]


--transit-gateway-multicast-domain-id (string)

The ID of the transit gateway multicast domain.

--transit-gateway-attachment-id (string)

The ID of the transit gateway attachment to associate with the transit gateway multicast domain.

--subnet-ids (list)

The IDs of the subnets to associate with the transit gateway multicast domain.



"string" "string" ...

--dry-run | --no-dry-run (boolean)

Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation . Otherwise, it is UnauthorizedOperation .

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

Global Options

--debug (boolean)

Turn on debug logging.

--endpoint-url (string)

Override command's default URL with the given URL.

--no-verify-ssl (boolean)

By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates.

--no-paginate (boolean)

Disable automatic pagination.

--output (string)

The formatting style for command output.

  • json
  • text
  • table

--query (string)

A JMESPath query to use in filtering the response data.

--profile (string)

Use a specific profile from your credential file.

--region (string)

The region to use. Overrides config/env settings.

--version (string)

Display the version of this tool.

--color (string)

Turn on/off color output.

  • on
  • off
  • auto

--no-sign-request (boolean)

Do not sign requests. Credentials will not be loaded if this argument is provided.

--ca-bundle (string)

The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings.

--cli-read-timeout (int)

The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds.

--cli-connect-timeout (int)

The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds.



To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal's quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To associate a transit gateway with a multicast domain

The following associate-transit-gateway-multicast-domain example associates the specified subnet and attachment with the specified multicast domain.

aws ec2 associate-transit-gateway-multicast-domain \
    --transit-gateway-multicast-domain-id tgw-mcast-domain-0c4905cef79d6e597 \
    --transit-gateway-attachment-id tgw-attach-028c1dd0f8f5cbe8e \
    --subnet-ids subnet-000de86e3b49c932a \
    --transit-gateway-multicast-domain-id tgw-mcast-domain-0c4905cef7EXAMPLE


    "Associations": {
        "TransitGatewayMulticastDomainId": "tgw-mcast-domain-0c4905cef79d6e597",
        "TransitGatewayAttachmentId": "tgw-attach-028c1dd0f8f5cbe8e",
        "ResourceId": "vpc-01128d2c240c09bd5",
        "ResourceType": "vpc",
        "Subnets": [
                "SubnetId": "subnet-000de86e3b49c932a",
                "State": "associating"

For more information, see Managing multicast domains in the Transit Gateways Guide.


Associations -> (structure)

Information about the transit gateway multicast domain associations.

TransitGatewayMulticastDomainId -> (string)

The ID of the transit gateway multicast domain.

TransitGatewayAttachmentId -> (string)

The ID of the transit gateway attachment.

ResourceId -> (string)

The ID of the resource.

ResourceType -> (string)

The type of resource, for example a VPC attachment.

ResourceOwnerId -> (string)

The ID of the Amazon Web Services account that owns the resource.

Subnets -> (list)

The subnets associated with the multicast domain.


Describes the subnet association with the transit gateway multicast domain.

SubnetId -> (string)

The ID of the subnet.

State -> (string)

The state of the subnet association.