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Method and apparatus for providing fast reroute of a multicast packet within a network element to an available port associated with a multi-link trunk

  • US 8,351,431 B2
  • Filed: 05/03/2010
  • Issued: 01/08/2013
  • Est. Priority Date: 05/13/2009
  • Status: Active Grant
First Claim
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1. A computer-implemented method in which a Forwarding Data Unit (FDU) performs operations providing a fast re-route of a multicast packet within a network element to an available port associated with a multi-link trunk, the method comprising the steps of:

  • receiving a packet by said FDU in a data plane of a network element;

    determining that the packet is a multicast packet;

    forwarding the packet to all egress FDUs having at least one port associated with at least one receiver of the multicast packet, said forwarding including determining if a receiver port is one of the group consisting of a stand alone port, a Multi Link trunk (MLT) group for a local FDU, and a MLT group for a remote FDU and forwarding a copy to each MLT member; and

    performing a lookup by each egress FDU in a synchronized local port state database to find a port for each receiver that is in an UP state.

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