Building backup tunnels for fast reroute in communications...

Details Building backup tunnels for fast reroute in communications... Building backup tunnels for fast reroute in communications...

2011-05-03

2011-05-03

Phan, Tri H (Department: 2471)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S229000, C370S238000, C709S238000

Reexamination Certificate

active

07936667

ABSTRACT:
In one embodiment, a method includes identifying at a node, a destination for which a primary path is defined between the node and the destination, transmitting a request message to a neighbor node for routing information for a backup path between the node and the destination, receiving a reply message containing an address identifying the backup path, and building a backup tunnel to the address. The request message includes at least one node identified as a node to be avoided in the backup path and a request cost. An apparatus for building backup tunnels is also disclosed.

REFERENCES:
patent: 6256295 (2001-07-01), Callon
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patent: 6728205 (2004-04-01), Finn et al.
patent: 6751746 (2004-06-01), Jain et al.
patent: 7707307 (2010-04-01), Miles et al.
patent: 2006/0187819 (2006-08-01), Bryant et al.
patent: 2008/0074997 (2008-03-01), Bryant et al.
patent: 2009/0252033 (2009-10-01), Ramakrishnan et al.

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