Managing loops between network devices by monitoring MAC moves

Details Managing loops between network devices by monitoring MAC moves Managing loops between network devices by monitoring MAC moves

2004-03-25

2009-02-24

Tsang, Fan (Department: 2614)

Multiplex communications

Fault recovery

Bypass an inoperative station

C370S216000, C370S218000, C370S219000, C370S220000

Reexamination Certificate

active

07496030

ABSTRACT:
A technique for managing loops between network devices such as customer and carrier edge devices involves monitoring the MAC moves that occur at a device to detect the existence of a loop and initiating a loop protection action if the MAC moves indicate that a loop exists. The number of MAC moves that indicates the existence of a loop is user programmable and pre-established in the device configuration. The number of MAC moves can be expressed as a MAC move threshold, which is defined in terms of, for example, a MAC move rate or a number of MAC moves. Typically, the loop protection action that is initiated in response to a detected loop involves blocking the flow of the looping packets at the corresponding device.

REFERENCES:
patent: 6023563 (2000-02-01), Shani
patent: 6104696 (2000-08-01), Kadambi et al.
patent: 6198729 (2001-03-01), Hallenstal
patent: 6603740 (2003-08-01), Du
patent: 6857027 (2005-02-01), Lindeborg et al.

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