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Methods, apparatus and data structures for preserving address and service level information in a virtual private network

  • US 8,243,627 B2
  • Filed: 02/20/2009
  • Issued: 08/14/2012
  • Est. Priority Date: 08/31/2000
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • receiving a packet originated by a source system via an ingress port, the packet including a destination layer 3 address and a layer 2 header portion;

    retrieving context information from the layer 2 header portion of the packet, the context information corresponding to the ingress port and including a multicast indicator;

    determining whether the packet is authorized for use of a multicast resource based on the multicast indicator; and

    allowing the packet to be forwarded to the destination layer 3 address when the packet is authorized.

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