Multiplex communications – Fault recovery – Bypass an inoperative channel
Reexamination Certificate
2008-12-31
2011-11-22
Vu, Huy D (Department: 2461)
Multiplex communications
Fault recovery
Bypass an inoperative channel
C370S216000, C370S228000
Reexamination Certificate
active
08064338
ABSTRACT:
Techniques for recovering from hierarchical virtual private LAN service (HVPLS) hub connectivity failure with a dynamic spoke pseudowire. According to one embodiment of the invention, a provider edge (PE) network element in the HVPLS hub monitors for a failure of HVPLS hub connectivity failure and reuses an HVPLS spoke connectivity failure recovery mechanism in an MTU by fabricating failure of one or more spoke facing connectivity elements coupling the MTU with the PE network element causing the MTU to transition to a secondary PE network element in the HVPLS hub. In addition, the PE network element establishes a dynamic spoke pseudowire for each virtual instance affected with the MTU to restore HVPLS hub connectivity for that PE network element.
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Kini Sriganesh
Mehta Rishi
Blakely , Sokoloff, Taylor & Zafman LLP
Mian Omer
Telefonaktiebolaget L M Ericsson (publ)
Vu Huy D
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