Patent ID: 9674075
Date: 2017-06-06
CPC Classifications: H04L

Claim:
1. A method comprising: initiating, by a router in a network, establishment of a shared tree toward a rendezvous point (RP) router in the network using a first protocol independent multicast (PIM) join message that identifies a multicast group; upon receiving multicast traffic for the multicast group over the shared tree, initiating, by the router, establishment of a shortest path tree toward a source of the multicast traffic for the multicast group using a second PIM join message that identifies the source and the multicast group; upon receiving the multicast traffic for the multicast group over both the shared tree and the shortest path tree, defining the shortest path tree as a primary path and defining the shared tree as a secondary path for multicast only fast re-route (MoFRR); programming, by a control unit of the router and into a forwarding unit of the router, a multicast route toward a receiver of the multicast traffic for the multicast group, the multicast route including the primary path and the secondary path; and forwarding, by the forwarding unit of the router, the multicast traffic for the multicast group according to the programmed multicast route including forwarding the multicast traffic received over the primary path toward the receiver, and dropping the multicast traffic received over the secondary path.