Piggybacking VPN information in BGP for network based VPN...

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header

Reexamination Certificate

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Details

C713S182000, C370S254000, C370S257000, C370S389000, C370S351000, C370S465000, C709S238000

Reexamination Certificate

active

09902683

ABSTRACT:
A common BGP framework is provided to achieve VPN information discovery in network based VPNs using modifications to existing BGP-4 multiprotocol extension path attributes. The framework allow each VPN to implement different OSI layer-2 or layer-3 protocols, and to implement different OSI layer-2 or layer-3 protocols from those used by the backbone of the shared network. The extensions added to BGP-4 apply both to Virtual Router (VR) models of VPN systems and to non-VR models.

REFERENCES:
patent: 6526056 (2003-02-01), Rekhter et al.
patent: 6813644 (2004-11-01), Jamieson et al.
patent: 2003/0016672 (2003-01-01), Rosen et al.
Rosen, E., et al., “BGP/MPLS VPNs”, IETF RFC 2547, Mar. 1999.
Fox, B., et al., “Virtual Private Networks Identifier”, IETF RFC 2685, Sep. 1999.
Bates, T., et al., “Multiprotocol Extensions for BGP-4”, IETF RFC 2283, Feb. 1998.
Rosen, E., et al., “BGP/MPLS VPNs”, IETF RFC 2547, Mar. 1999.
Fox, B., et al., “Virtual Private Networks Identifier”, IETF RFC 2685, Sep. 1999□□.
Bates, T., et al., “Multiprotocol Extensions for BGP-4”, IETF RFC 2283, Feb. 1998.
Rekhter, Y., and Li, T., “A Border Gateway Protocol 4 (BGP-4)”, IETF RFC1771, T. J. Watson Research Center, Cisco, Mar. 1995.
Bates, T. et al., “Multiprotocol Extensions for BGP-4”, IETF RFC2283, Cisco Systems, Juniper Networks, Feb. 1998.
Rosen, E., et al., BGP/MPLS VPNs, IETF Internet-Draft update of RFC2547, May 2000.
Ould-Brahim, H., et al., “Network based IP VPN Architecture using Virtual Routers”, IETF Internet-Draft, Mar. 2001.
Fox, B., et al., “Virtual Private Networks Identifier”, IETF RFC2685, Sep. 1999.

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