06857026 is referenced by 106 patents and cites 30 patents.

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.

Title
Using alternate routes for fail-over in a communication network
Application Number
9/460566
Publication Number
6857026 (B1)
Application Date
December 14, 1999
Publication Date
February 15, 2005
Inventor
Bradley Cain
Cambridge
MA, US
Agent
Steubing McGuinness & Manaras
Assignee
Nortel Networks
CA
IPC
G06F 015/16
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