System and method for detecting and isolating a remote loop

Details System and method for detecting and isolating a remote loop System and method for detecting and isolating a remote loop

2011-05-17

2011-05-17

Lee, Andrew (Department: 2472)

Multiplex communications

Fault recovery

Bypass an inoperative station

C370S249000

Reexamination Certificate

active

07944816

ABSTRACT:
A system and method are provided for enabling a first network to detect a loop in a second network connected thereto. The first network runs a first instance of a Spanning Tree Protocol and the second network runs either a different instance or no instance. The method includes sending a Remote Loop Detection Packet (“RLDP”) from the ports in bridges of the first network which are connected to the second network. The RLDP includes identifiers such as the source bridge, port and VLAN. The system and method further includes checking for receipt of the RLDP on the same bridge which sent the RLDP. If such a receipt occurs, a loop is detected and one of the ports of the receiving/sending bridge is blocked.

REFERENCES:
patent: 5761435 (1998-06-01), Fukuda et al.
patent: 5878232 (1999-03-01), Marimuthu
patent: 5959968 (1999-09-01), Chin et al.
patent: 5995486 (1999-11-01), Iliadis
patent: 6163543 (2000-12-01), Chin et al.
patent: 6202114 (2001-03-01), Dutt et al.
patent: 6204114 (2001-03-01), Clampitt et al.
patent: 6262977 (2001-07-01), Seaman et al.
patent: 6282589 (2001-08-01), Porterfield et al.
patent: 6304575 (2001-10-01), Caroll et al.
patent: 6628624 (2003-09-01), Mahajan et al.
patent: 6628661 (2003-09-01), Goldman et al.
patent: 6658004 (2003-12-01), Kadansky et al.
patent: 6697339 (2004-02-01), Jain
patent: 6717922 (2004-04-01), Hsu et al.
patent: 6766482 (2004-07-01), Yip et al.
patent: 6795403 (2004-09-01), Gundavelli
patent: 6801506 (2004-10-01), Dey
patent: 6813250 (2004-11-01), Fine et al.
patent: 6898189 (2005-05-01), Di Benedetto et al.
patent: 6937576 (2005-08-01), Di Benedetto et al.
patent: 6985449 (2006-01-01), Higashiyama
patent: 7003705 (2006-02-01), Yip et al.
patent: 7061858 (2006-06-01), Di Benedetto et al.
patent: 7126923 (2006-10-01), Yang et al.
patent: 7154861 (2006-12-01), Merchant et al.
patent: 7171504 (2007-01-01), Ishii
patent: 7209435 (2007-04-01), Kuo et al.
patent: 7286491 (2007-10-01), Smith
patent: 7558205 (2009-07-01), Moncada-Elias et al.
patent: 7606229 (2009-10-01), Foschiano et al.
patent: 7620693 (2009-11-01), Mott et al.
patent: 2002/0154606 (2002-10-01), Duncan et al.
patent: 2002/0159398 (2002-10-01), Yamada et al.
patent: 2002/0181413 (2002-12-01), Kitagawa
patent: 2003/0142680 (2003-07-01), Oguchi
patent: 2003/0169694 (2003-09-01), Seaman
patent: 2003/0223379 (2003-12-01), Yang et al.
patent: 2003/0223442 (2003-12-01), Huang et al.
patent: 2004/0081171 (2004-04-01), Finn
patent: 2004/0255050 (2004-12-01), Takehiro et al.
patent: 2005/0013260 (2005-01-01), Ramanathan et al.
patent: 2005/0259597 (2005-11-01), Di Benedetto et al.
patent: 2006/0206656 (2006-09-01), Di Benedetto et al.
patent: 2006/0233186 (2006-10-01), Portoiani et al.
patent: 2008/0037428 (2008-02-01), Nation et al.
U.S. Appl. No. 11/246,945, filed Oct. 6, 2005.
U.S. Appl. No. 12/580,230, filed Oct. 15, 2009.
Office Action issued in U.S. Appl. No. 10/456,756, filed Mar. 21, 2007.
Office Action issued in U.S. Appl. No. 10/456,756, filed Oct. 18, 2007.
Office Action issued in U.S. Appl. No. 10/456,756, filed May 7, 2008.
Office Action issued in U.S. Appl. No. 10/456,756, filed Jan. 27, 2009.
Office Action issued in U.S. Appl. No. 10/456,756, filed Jul. 20, 2009.
Notice of Allowance issued in U.S. Appl. No. 10/456,756, filed Sep. 17, 2009.
Office Action issued in U.S. Appl. No. 10/632,591, filed Jun. 26, 2007.
Office Action issued in U.S. Appl. No. 10/632,591, filed Mar. 5, 2008.
Notice of Allowance issued in U.S. Appl. 10/632,591, filed Aug. 4, 2008.
Notice of Allowance issued in U.S. Appl. No. 10/632,591, filed Jan. 12, 2009.
Notice of Allowance issued in U.S. Appl. No. 10/632,591, filed Mar. 13, 2009.
Notice of Allowance issued in U.S. Appl. No. 10/632,591, filed Apr. 30, 2009.
Office Action issued in U.S. Appl. No. 10/632,635, filed Sep. 19, 2007.
Office Action issued in U.S. Appl. No. 10/632,635, filed Mar. 17, 2008.
Office Action issued in U.S. Appl. No. 10/632,635, filed Dec. 3, 2008.
Notice of Allowance issued in U.S. Appl. No. 10/632,635, filed May 20, 2009.
Office Action issued in U.S. Appl. No. 11/246,945, filed Jun. 30, 2008.
Office Action issued in U.S. Appl. No. 11/246,945, filed Dec. 30, 2008.
Office Action issued in U.S. Appl. No. 11/246,945, filed Jul. 7, 2009.
U.S. Appl. No. 10/632,591, filed Aug. 1, 2003.
U.S. Appl. No. 10/632,635, filed Aug. 1, 2003.
Office Action dated Mar. 30, 2010, U.S. Appl. No. 11/246,945.
U.S. Appl. No. 10/632,635, filed Aug. 1, 2001, Office Action filed Dec. 3, 2008.
U.S. Appl. No. 10/456,756, filed Jun. 9, 2003.
IEEE Standard for Information technology—Telecommunications and Information exchange between systems—Local and Metropolitan Area Networks—Common specifications, Part 3: Media Access Control (MAC) Bridges, ansi/ieee Std. 802.1D, 1998 Ed.
Abdelhalim, Ahmed, IP/MPLS-Based VPS's Layer-3 vs. Layer-2, Whitepaper, 16 pages (Mar. 22, 2002).
Cobb, Jorge Arturo, “Convergent Multi-Path Routing,” Journal Title: International Conference on Network Protocols, 10 pages (2000).
Finn, Norman, “Spanning the World with Ethernet,” Cisco Systems, Spanning The World Rev. 7, Presented to IEEE 802.1, pp. 1-132 (publication date unknown) 2001.
U.S. Appl. No. 11/246,945, Office Action dated Jun. 30, 2008.
Office Action in U.S. Appl. No. 12/580,230, mailed Aug. 19, 2010.
Notice of Allowance in U.S. Appl. No. 11/246,945, mailed Sep. 2, 2010.
U.S. Appl. No. 12/878,973, filed Sep. 9, 2010.
Notice of Allowance in U.S. Appl. No. 12/580,230, mailed Oct. 6, 2010.
Supplemental Notice of Allowance in U.S. Appl. No. 12/580,230, mailed Nov. 1, 2010.
U.S. Appl. No. 12/939,115, filed Nov. 3, 2010.

Affiliated with

Also associated with

Rating

System and method for detecting and isolating a remote loop does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for detecting and isolating a remote loop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for detecting and isolating a remote loop will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2698121