Multiplex communications – Fault recovery – Bypass an inoperative station
Reexamination Certificate
2006-10-11
2011-12-20
Vu, Huy (Department: 2461)
Multiplex communications
Fault recovery
Bypass an inoperative station
C370S225000, C370S228000, C370S217000, C370S218000, C370S224000
Reexamination Certificate
active
08081563
ABSTRACT:
The protection of multi-segment pseudowires by utilizing pre-computed backup paths is disclosed herein. Disclosed embodiments include methods that establish at least one backup path for multi-segment pseudowires, the establishing being performed prior to detection of failure in the primary path. Upon detecting a path failure, the detected failure is signaled to the head-end, a pre-computed backup path is chosen, and the chosen backup path is signaled to the tail-end. In other disclosed embodiments, apparatus are configured to establish, prior to detection of failure in the primary path, at least one backup path for the multi-segment pseudowire. Networks can be configured to signal a detected failure to the head-end; choose a pre-computed backup path; and signal the backup path to the tail-end.
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Guichard Jim
Martini Luca
Nadeau Thomas David
Patel Keyur
Brinks Hofer Gilson & Lione
Cisco Technology Inc.
Mian Omer
Vu Huy
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