Multiplex communications – Fault recovery
Reexamination Certificate
2011-06-28
2011-06-28
Ferris, Derrick W (Department: 2463)
Multiplex communications
Fault recovery
C370S252000
Reexamination Certificate
active
07969866
ABSTRACT:
Techniques for recovering from hierarchical virtual private LAN service (HVPLS) hub connectivity failure are described herein. In one embodiment of the invention, a provider edge network element reuses an HVPLS spoke connectivity failure recovery mechanism in an MTU to protect against a failure of HVPLS hub connectivity. The PE network element monitors hub facing connectivity elements and declares a hub connectivity failure upon a certain amount of those hub facing connectivity elements failing, and fabricates a failure of its spoke facing connectivity elements causing the MTU to detect an HVPLS spoke connectivity failure and switch to a secondary HVPLS spoke connection. Other methods and apparatuses are described.
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Khan Faisal Andre
Kini Sriganesh
Blakely , Sokoloff, Taylor & Zafman LLP
Brockman Angel
Ferris Derrick W
Telefonaktiebolaget L M Ericsson (publ)
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