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METHOD AND DEVICE FOR MANAGING MULTICAST GROUPS

  • US 20090310609A1
  • Filed: 08/24/2009
  • Published: 12/17/2009
  • Est. Priority Date: 06/26/2007
  • Status: Active Grant
First Claim
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1. A router having at least one downstream network interface situated in a data network system between sources that send multicast packets to at least one multicast group address and one or more hosts that request data from the multicast group address and the sources, the router communicates with the one or more hosts via a communications protocol based on the IGMP (Internet Group Management Protocol) or the MLD (Multicast Listener Discovery) protocol and stores for each downstream network interface and multicast group address at least one IGMP or MLD INCLUDE source record containing information about include source lists derived by data requests made by the one or more hosts and at least one IGMP or MLD EXCLUDE source record containing information about exclude source lists derived by data requests made by the one or more hosts.

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