Technique for determining whether to reestablish fast...

Details Technique for determining whether to reestablish fast... Technique for determining whether to reestablish fast...

2006-02-03

2011-12-06

Yao, Kwang B (Department: 2473)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S248000

Reexamination Certificate

active

08072879

ABSTRACT:
A technique dynamically determines whether to reestablish a Fast Rerouted primary tunnel based on path quality feedback of a utilized backup tunnel in a computer network. According to the novel technique, a head-end node establishes a primary tunnel to a destination, and a point of local repair (PLR) node along the primary tunnel establishes a backup tunnel around one or more protected network elements of the primary tunnel, e.g., for Fast Reroute protection. Once one of the protected network elements fail, the PLR node “Fast Reroutes,” i.e., diverts, the traffic received on the primary tunnel onto the backup tunnel, and sends notification of backup tunnel path quality (e.g., with one or more metrics) to the head-end node. The head-end node then analyzes the path quality metrics of the backup tunnel to determine whether to utilize the backup tunnel or reestablish a new primary tunnel.

REFERENCES:
patent: 5912877 (1999-06-01), Shirai et al.
patent: 6154444 (2000-11-01), Masuo et al.
patent: 6560654 (2003-05-01), Fedyk et al.
patent: 6628649 (2003-09-01), Raj et al.
patent: 6751190 (2004-06-01), Swallow
patent: 6778492 (2004-08-01), Charny et al.
patent: 6831898 (2004-12-01), Edsall et al.
patent: 6850486 (2005-02-01), Saleh et al.
patent: 6895441 (2005-05-01), Shabtay et al.
patent: 6978394 (2005-12-01), Charny et al.
patent: 7406032 (2008-07-01), Li et al.
patent: 7489695 (2009-02-01), Ayyangar
patent: 2003/0037276 (2003-02-01), Mo et al.
patent: 2003/0090995 (2003-05-01), Illikkal et al.
patent: 2003/0126287 (2003-07-01), Charny et al.
patent: 2003/0233595 (2003-12-01), Charny et al.
patent: 2004/0008687 (2004-01-01), Matsubara
patent: 2004/0090913 (2004-05-01), Scudder et al.
patent: 2004/0196827 (2004-10-01), Xu et al.
patent: 2005/0083928 (2005-04-01), Sivabalan et al.
patent: 2005/0097219 (2005-05-01), Goguen et al.
patent: 2005/0157697 (2005-07-01), Lee et al.
patent: 2005/0185632 (2005-08-01), Draves et al.
patent: 2005/0213508 (2005-09-01), Gerstel
patent: 2005/0281192 (2005-12-01), Nadeau et al.
patent: 2006/0013126 (2006-01-01), Yasuoka et al.
patent: 2007/0011284 (2007-01-01), Le Roux et al.
patent: 2007/0036073 (2007-02-01), Yamada et al.
NPL Inter-AS MPLS IETF Draft dated Jun. 2003 pp. 1-33. t.
Rekhter, Y. et al., RFC 1771, “A Border Gateway Protocol 4 (BGP-4)”, Network Working Group, Mar. 1995, pp. 1-54.
Moy, J., RFC 2328, entitled OSPF Version 2, Apr. 1998, pp. 1-83.
Callon, R., RFC 1195, entitled Use of OSI ISIS for routing in TCP/IP and Dual Environments, Dec. 1990, pp. 1-80.
Awduche, D., RFC 3209, entilted RSVP-TE: Extensions to RSVP for LSP Tunnels, Dec. 2001, pp. 1-57.
Smit, H., RFC 3784, entitled Intermediate-System-to-Intermediate-System (IS-IS) Extensions for Traffic Engineering (TE), Jun. 2004, pp. 1-13.
Katz, at al., RFC 3630, entitled Traffic Engineering (TE) Extensions to OSPF Version 2, Sep. 2003, pp. 1-14.
Pan, et al., RFC 4090, entitled Fast Reroute Extensions to RSVP-TE for LSP Tunnels, May 2005, pp. 1-36.
Braden, R. et al., RFC 2205, entitled Resource ReSerVation Protocol (RSVP), Version 1 Functional Specification, Sep. 1997, pp. 1-105.
Berger, L., RFC 3473, entitled Generalized Multi-Protocol Label Switching (GMPLS) Signaling Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Extensions, Jan. 2003, pp. 1-40.
Mannie, E., RFC 3945, entitled Generalized Multi-Protocol Label Switching (GMPLS) Architecture, Oct. 2004, pp. 1-65.
Mannie, E., RFC 3946, entitled Generalized Multi-Protocol Label Switching (GMPLS) Extensions for Synchronous Optical Network (SONET) and Synchronous Digital Hierarchy (SDH) Control, Oct. 2004, pp. 1-25.
Vasseur, et al., Network Working Group Internet Draft, entitled Path Computation Element (PCE) Communication Protocol (PCEP)—Version 1 (draft-vasseur-pce-pcep-02.txt), Sep. 2005, pp. 1-46.
Farrel, et al., Network Working Group Internet Draft, entitled Encoding Attributes for Multiprotocol Label Switching (MPLS) Label Switched Path (LSP) Establishment Using RSVP-TE (draft-ietf-mpls-rsvpte-attributes-05.txt), May 2005, pp. 1-19.

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