Transparent re-routing of MPLS traffic engineering LSPs...

Multiplex communications – Fault recovery – Bypass an inoperative channel

Reexamination Certificate

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Reexamination Certificate

active

07345994

ABSTRACT:
Local rerouting around a failed component link of a link bundle is provided by immediately substituting one or more other component links of the same link bundle. The substitution of component links is performed at the point of failure without signaling to other nodes. This minimizes signaling traffic particularly when large numbers of LSPs are impacted by a single component link failure. Also, since LSP repair can be accomplished very quickly, traffic disruption is minimized.

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Kompella et al., Link Bundling in MPLS Traffic Engineering, Jan. 2003, draft-ietf-mpls-bundle-04.txt, pp. 1-9, especially pp. 2-4.
Awduche et al., “RSVP-TE: Extensions to RSVP for LSP Tunnels”, RFC 3209, Internet Engineering Task Force, Dec. 2001.
Awduche et al., “Requirements for Traffic Engineering Over MPLS”, RFC 2702, Internet Engineering Task Force, Sep. 1999.
Berger, “Generalized Multi-Protocol Label Switching (GMPLS) Signaling Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Extensions”, RFC 3473, Internet Engineering Task Force, Jan. 2003.
Braden et al., “Resource ReSerVation Protocol (RSVP)—Version 1 Functional Specification”, RFC 2205, Internet Engineering Task Force, Sep. 1997.
Kompella et al., “Link Bundling in MPLS Traffic Engineering”, Internet Draft, Internet Engineering Task Force, Jul. 2002.
Le Faucheur et al., “Requirements for Support of Differentiated Services-aware MPLS Traffic Engineering”, RFC 3564, Internet Engineering Task Force, Jul. 2003.
Pan et al., “Fast Reroute Extensions to RSVP-TE for LSP Tunnels”, Internet Draft, Internet Engineering Task Force, Oct. 2001.
Rosen et al., “Multiprotocol Label Switching Architecture”, RFC 3031, Internet Engineering Task Force, Jan. 2001.

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