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Synchronizing multicast information for linecards

  • US 8,503,289 B2
  • Filed: 10/27/2010
  • Issued: 08/06/2013
  • Est. Priority Date: 03/19/2010
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a set of ports;

    a first processor configurable to perform a set of multicast routing-related functions and to maintain a first routing information usable for performing the set of multicast routing-related functions; and

    a linecard coupled to at least one port from the set of ports, the linecard comprising a packet processor with associated one or more memories and a linecard processor coupled to a volatile memory;

    wherein the linecard processor is configurable to;

    maintain a second routing information in the volatile memory based on the first routing information;

    program, based on the second routing information, a first memory from the associated one or more memories with a third routing information, the third routing information used by the packet processor to facilitate forwarding of a multicast packet;

    enable correlation information to be preserved across a reboot of the linecard processor; and

    upon reboot of the linecard processor;

    build a fourth routing information in the volatile memory; and

    link the fourth routing information with the third routing information used by the packet processor, using the correlation information.

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