What is UDLR?

Unidirectional Link Routing

Unidirectional Link Routing provides a method for forwarding multicast packets over a unidirectional link, such as a satellite link. Here the technical challenge is how to get the routers to RPF correctly despite having different forward and return paths. There are two methods for dealing with this unidirectional incongruency:

UDLR Tunnels (includes commands)

IGMP UDLR

- IGMP UDLR commands