**To search one or more transit gateway multicast groups and return the group membership information** The following ``search-transit-gateway-multicast-groups`` example returns the group membership of the specified multicast group. :: aws ec2 search-transit-gateway-multicast-groups \ --transit-gateway-multicast-domain-id tgw-mcast-domain-000fb24d04EXAMPLE Output:: { "MulticastGroups": [ { "GroupIpAddress": "224.0.1.0", "TransitGatewayAttachmentId": "tgw-attach-0372e72386EXAMPLE", "SubnetId": "subnet-0187aff814EXAMPLE", "ResourceId": "vpc-0065acced4EXAMPLE", "ResourceType": "vpc", "NetworkInterfaceId": "eni-03847706f6EXAMPLE", "GroupMember": false, "GroupSource": true, "SourceType": "static" } ] } For more information, see `Managing multicast groups <https://docs.aws.amazon.com/vpc/latest/tgw/manage-multicast-group.html>`__ in the *Transit Gateways Guide*.