Question

A media company is migrating an on-premises video distribution platform to AWS. The application relies on IP multicast to stream a single source to hundreds of receivers spread across multiple VPCs in the same Region. The team needs a design that supports multicast natively without deploying overlay software on every instance, while allowing receivers to dynamically join and leave multicast groups. Which design should the network architect recommend?

Accepted Answer

Create a Transit Gateway with multicast support enabled, attach the participating VPCs, and configure a multicast domain with IGMPv2 enabled so receivers can dynamically join and leave groups.

Answer

Establish VPC peering connections between all VPCs and enable multicast routing on the peering connections so the source can reach all receivers.

Answer

Deploy a Network Load Balancer as the multicast source and register all receiver instances as targets across the VPCs to replicate the multicast stream.

Answer

Use AWS PrivateLink to expose the video source as an endpoint service and have each receiver VPC create interface endpoints to subscribe to the multicast stream.