Using alternate routes for fail-over in a communication network

Details Using alternate routes for fail-over in a communication network Using alternate routes for fail-over in a communication network

2005-02-15

2005-02-15

Dharia, Rupal (Department: 2141)

Electrical computers and digital processing systems: multicomput

Computer-to-computer data routing

Alternate path routing

C709S227000, C709S229000, C709S245000, C714S001000, C714S004110, C370S389000, C370S396000

Reexamination Certificate

active

06857026

ABSTRACT:
Using alternate routes for fail-over in a communication network involves maintaining a preferred route and an alternate route in a routing table and routing protocol messages according to the alternate route when the preferred route is unavailable. A node obtains multiple routes for a destination, prioritizes the routes, and installs multiple routes in the routing table, including at least the preferred route and the alternate route. When the node receives a protocol message, the node searches the routing table for a highest priority route that is available for routing the protocol message, and routes the protocol message according to the highest priority route that is available for routing the protocol message. When a route becomes unavailable, the node updates the routing table to indicate that the route is unavailable, and may compute new routes and/or re-prioritize existing routes.

REFERENCES:
patent: 5115433 (1992-05-01), Baran et al.
patent: 5491694 (1996-02-01), Oliver et al.
patent: 5509123 (1996-04-01), Dobbins et al.
patent: 5557748 (1996-09-01), Norris
patent: 5588121 (1996-12-01), Reddin et al.
patent: 5600644 (1997-02-01), Chang et al.
patent: 5710908 (1998-01-01), Man
patent: 5721819 (1998-02-01), Galles et al.
patent: 5802316 (1998-09-01), Ito et al.
patent: 5845086 (1998-12-01), Doebrich et al.
patent: 5881246 (1999-03-01), Crawley et al.
patent: 5905729 (1999-05-01), Gaddis et al.
patent: 5905872 (1999-05-01), DeSimone et al.
patent: 5909440 (1999-06-01), Ferguson et al.
patent: 5917805 (1999-06-01), Manning et al.
patent: 5918016 (1999-06-01), Brewer et al.
patent: 5938736 (1999-08-01), Muller et al.
patent: 5956339 (1999-09-01), Harada et al.
patent: 5964841 (1999-10-01), Rekhter
patent: 5978364 (1999-11-01), Melnik
patent: 6032192 (2000-02-01), Wegner et al.
patent: 6112247 (2000-08-01), Williams
patent: 6147971 (2000-11-01), Rochberger et al.
patent: 6304912 (2001-10-01), Oguchi et al.
patent: 6401030 (2002-06-01), Watanabe et al.
patent: 6567380 (2003-05-01), Chen
patent: 6728779 (2004-04-01), Griffin et al.
patent: 6731729 (2004-05-01), Eng et al.
patent: 6744775 (2004-06-01), Beshai et al.
patent: 20020021675 (2002-02-01), Feldman

Affiliated with

Also associated with

Rating

Using alternate routes for fail-over in a communication network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Using alternate routes for fail-over in a communication network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Using alternate routes for fail-over in a communication network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3498132