Piggybacking VPN information in BGP for network based VPN architectures

  • US 7,274,704 B1
  • Filed: 07/12/2001
  • Issued: 09/25/2007
  • Est. Priority Date: 07/14/2000
  • Status: Expired due to Fees
First Claim
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1. A Border Gateway Protocol Speaker (BGP Speaker) in a communication system which implements at least one network based Virtual Private Network (NB-VPN) across a backbone, the at least one NB-VPN using an Open System Interconnect (OSI) layer-2 protocol and an OSI layer-3 protocol, one or more of the at least one NB-VPN using an OSI layer-2 protocol different from an OSI layer-2 protocol used by the backbone or using an OSI layer-3 protocol different from an OSI layer-3 protocol used by the backbone, the BGP Speaker operable to:

  • transmit an Update message being in conformance with a Border Gateway Protocol (BGP), the Update message further including;

    Virtual Private Network (VPN) Membership information that indicates an identification of at least one VPN to which the Update message relates;

    a VPN Reachability Mode field that indicates a type of VPN model being used by the at least one VPN;

    VPN Reachability information that indicates at least one route by which the at least one VPN can be reached; and

    Tunnel Mechanism information that indicates characteristics of a tunnel used to transport VPN packets across the backbone.

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