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Method and apparatus for controlling fanout of a multicast tree

  • US 6,785,245 B1
  • Filed: 10/20/1999
  • Issued: 08/31/2004
  • Est. Priority Date: 10/20/1999
  • Status: Expired due to Fees
First Claim
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1. A method of controlling fanout at an ingress node of a dynamic multicast tree for a multicast session in a differentiated services (DS) network, comprising the steps of:

  • a) receiving a graft request message from an egress node that has not been joined to the multicast tree;

    b) determining whether a number of egress points specified by a service level specification (SLS) associated with the multicast session permits the egress node to be grafted;

    c) if the graft is permitted, sending a graft permission response message to the egress node; and

    if graft is not permitted a graft-redirect message is sent from the egress node to a downstream requesting node to permit the downstream requesting node to attempt to graft to an existing branch of the multicast tree.

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