Multicast-only fast re-route processing for point-to-multipoint pseudowire

摘要

To protect a multicast data stream for a multicast group, two P2MP pseudowires are established to deliver multicast data for the particular multicast group to an aggregation node. The two P2MP pseudowires are defined such that the pseudowires have no transport nodes in common other than the aggregation node. The aggregation node replicates data received via a primary pseudowire of the two P2MP pseudowires to subscribers of the multicast group. The aggregation node monitors the data from the primary pseudowire to detect failures in the data flow. When a failure is detected in the primary data stream, the aggregation node replicates data received via a secondary pseudowire of the two P2MP pseudowires for delivery to the multicast group subscribers.

主权项

1. A method comprising:
receiving data packets of a first data stream, at an aggregation node from one or more source nodes, via a point-to-multipoint path over a network; receiving data packets of a second data stream that is different from the first data stream, at the aggregation node, from the one or more source nodes, via a primary point-to-point path over the network; wherein the second data stream is different from the first data stream; merging, at the aggregation node, data packets of the first data stream received via the point-to-multipoint path with data packets of the second data stream received via the primary point-to-point path, into a merged data stream for a delivery to an access node via one interface; forwarding data packets of the merged data stream over the network to the access node.