Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2011-07-19
2011-07-19
Abelson, Ronald (Department: 2476)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
C370S220000, C370S221000, C370S228000
Reexamination Certificate
active
07983153
ABSTRACT:
In one embodiment, an edge device in a first routing domain is configured to communicate with a second routing domain via a data link. The edge device receives a data packet containing a destination address that is reachable via the second routing domain and an indication that the data packet is a protected packet that was previously rerouted from another edge device in the first routing domain via a Multi-Protocol Label Switching (MPLS) Fast Reroute (FRR) backup path. The edge device determines if communication with the second routing domain is still available via the data link, and if so, removes the indication that the data packet is a protected packet and forwards the data packet to the second routing domain, and, if not, drops the data packet to prevent the data packet from being rerouted a second time in the first routing domain on another MPLS FRR backup path.
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Filsfils Clarence
Guichard Jim
Previdi Stefano B.
Scudder John Galen
Vasseur Jean-Philippe
Abelson Ronald
Cesari and McKenna LLP
Cisco Technology Inc.
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