Multiplex communications – Fault recovery – Bypass an inoperative channel
Reexamination Certificate
2005-10-20
2010-12-21
Ngo, Ricky (Department: 2464)
Multiplex communications
Fault recovery
Bypass an inoperative channel
C370S254000, C709S238000
Reexamination Certificate
active
07855953
ABSTRACT:
A method of managing forwarding of data in a first autonomous system (AS) is described. The first AS includes a plurality of border routers having inter-domain links to one or more remote AS's and an associated exterior communications protocol. The border routers use an interior communications protocol with other border routers in the first AS using primary tunnels. The method comprises the steps, performed at a first border router having a primary route via an inter-domain link to a remote AS, of constructing an alternate route to the remote AS via second border router in the first AS, instigating a backup tunnel to the second border router upon failure of the primary route and sending a failure message to the other border routers.
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Filsfils Clarence
Previdi Stefano B.
Scudder John Galen
Cesari and McKenna LLP
Cisco Technology Inc.
Mui Gary
Ngo Ricky
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