Optimization of rules used for prevention of duplication and looping of multicast traffic within a multi-homed cluster of backbone edge bridges in a shortest path bridging multicast network

摘要

A method, apparatus and computer program product for prevention of duplication and looping of multicast traffic within a multi-homed cluster of backbone edge bridges is presented. Multicast traffic is received on a first Access device (AD). The multicast traffic is forwarded from the first AD to a first Backbone edge Bridge (BEB). Any available Backbone Virtual Local Area Network (BVLAN) is chosen to forward the multicast traffic into a transport network by the first BEB. The multicast traffic is received at a second BEB from said first BEB. A determination is made whether a nickname in a packet of the multicast traffic is a nickname of the first BEB and when the nickname in the packet matches a nickname of the first BEB then abstaining from making copies of said packet for said first AD and said second AD.

主权项

1. A computer-implemented method comprising:
in a network system comprising a transport network and a cluster of at least a first Backbone Edge Bridge (BEB) and a second BEB, wherein each of the first BEB and the second BEB is in communication with the transport network, a first multihomed Access Device (AD), and a second multihomed AD, receiving, by the first BEB, multicast traffic from the first AD; choosing, by the first BEB, any available Backbone Virtual Local Area Network (BVLAN) from a plurality of available BVLANs across the transport network to forward the multicast traffic into the transport network; receiving, via the chosen BVLAN, the multicast traffic at the second BEB from the first BEB; determining, by the second BEB, whether a nickname in a packet of the multicast traffic is a nickname of the first BEB, wherein:
when the nickname in the packet does not match a nickname of the first BEB, determining whether to make a copy of the packet for the first AD and the second AD based on the chosen BVLAN, andwhen the nickname in the packet matches the nickname of the first BEB making no copies of the packet for the first AD and the second AD.