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Multicast routing using core based trees

DC
  • US 5,331,637 A
  • Filed: 07/30/1993
  • Issued: 07/19/1994
  • Est. Priority Date: 07/30/1993
  • Status: Expired due to Term
First Claim
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1. A method for enabling a particular node to join a particular multicast group of nodes in a network comprising a plurality of nodes, said method comprising the steps of:

  • transmitting from said particular node a join request control packet indicating a multicast address of a core node on a multicast tree corresponding to said multicast group,receiving said join request control packet at another node,writing an address of the node from which said join request control packet was received in an entry of a forwarding table maintained at said other node, which entry is indexed by said multicast address of said core node, andif said other node is not already on said multicast tree of said particular multicast group, writing an address of a next node on a path to said core node in said forwarding table entry indexed by said multicast address of said core node and retransmitting said packet from said other node to said next node.

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