Loop prevention technique for MPLS using service labels

Details Loop prevention technique for MPLS using service labels Loop prevention technique for MPLS using service labels

2011-06-14

2011-06-14

Yao, Kwang B (Department: 2473)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S469000

Reexamination Certificate

active

07961600

ABSTRACT:
In one embodiment, a loss of communication is detected between a first edge device of a computer network and a neighboring routing domain. A data packet is received at the first edge device, where the received data packet contains a destination address that is reachable via the neighboring routing domain. A determination is made whether a service label is located in a Multi-Protocol Label Switching (MPLS) label stack included in the received data packet. A service label in the MPLS label stack indicates that the received data packet was previously rerouted in accordance with fast reroute (FRR) operations. In response to a determination that the received data packet does not include a service label in the MPLS label stack, the received data packet is rerouted to a second edge device of the computer network for forwarding to the neighboring routing domain.

REFERENCES:
patent: 6339595 (2002-01-01), Rekhter et al.
patent: 6665273 (2003-12-01), Goguen et al.
patent: 6728246 (2004-04-01), Egbert et al.
patent: 6778492 (2004-08-01), Charny et al.
patent: 7093027 (2006-08-01), Shabtay et al.
patent: 7152115 (2006-12-01), Ould Brahim et al.
patent: 7286467 (2007-10-01), Sylvain
patent: 7551551 (2009-06-01), Filsfils et al.
patent: 7633859 (2009-12-01), Filsfils et al.
patent: 2002/0060985 (2002-05-01), Lee et al.
patent: 2002/0112072 (2002-08-01), Jain
patent: 2002/0131411 (2002-09-01), Bhatia
patent: 2003/0028818 (2003-02-01), Fujita
patent: 2003/0233595 (2003-12-01), Charny et al.
patent: 2004/0052207 (2004-03-01), Charny et al.
patent: 2004/0109687 (2004-06-01), Park et al.
patent: 2004/0114595 (2004-06-01), Doukai
patent: 2004/0156310 (2004-08-01), Fredette et al.
patent: 2004/0196822 (2004-10-01), Proctor
patent: 2004/0196827 (2004-10-01), Xu et al.
patent: 2005/0030921 (2005-02-01), Yau
patent: 2006/0193248 (2006-08-01), Filsfils et al.
patent: 06734608.0 (2010-10-01), None
PCT Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declartion, International Application No. PCT/US06/04488, International Filing Date Feb. 9, 2006, Date of Mailing Aug. 13, 2007, 11 pages.
Andrew S. Tanenbaum, “Computer Networks”, Fourth Edition, Section 1.4.2 pp. 41-44, Pearson Education 2003.
Radia Perlman, “Interconnections Second Edition: Bridges, Routers, Switches, and Internetworking Protocols”, Chapter 9 pp. 189-220, Addison Wesley Longman, Inc. 2000.
Radia Perlman, “Interconnections Second Edition: Bridges, Routers, Switches, and Internetworking Protocols”, Sections 12.1-12.3 pp. 299-324, Addison Wesley longman, Inc. 2000.
Stephen A. Thomas, “IP Switching and Routing Essentials”, Chapter 7 pp. 221-243, 2002.
Ivan Pepelnjak and Jim Guichard, “MPLS and VPN Architectures”, Chapters 8-9 pp. 145-205, Cisco Press 2001.
E. Rosen and Y.Rekhter, “BGP/MPLS VPNs”, Request for Comments 2547, Mar. 1999.
Y. Rekhter and T. Li, “A Border Gateway Protocol 4 (BGP-4)”, Request for Comments 1771, Mar. 1995.
“MPLS Traffic Engineering Fast Reroute-Link Protection” Cisco Systems, Inc., 2005, all pages, available at http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120st/120st16/frr.htm#wp1015327.
Bryant, S., et al., IP Fast Reroute Using Tunnels, Internet Engineering Task Force Standard Working Draft, draft-bryant-ipfrr-tunnels-01.txt, Oct. 2004, 28 pages.
Bryant, S., et al., A Framework for Loop-Free Convergence, Internet Engineering Task Force Standard Internet Draft, draft-bryant-shand-If-conv-frmwk-00.txt, Oct. 2004, 16 pages.

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