Non-Stop Routing of Routing Protocol

摘要

A method is provided for a router to implement non-stop routing of a routing protocol. The router has primary and backup routing engines or a single routing engine. When the primary routing engine or the only routing engine is operating normally, neighbor state information is backed up to the backup routing engine or a nonvolatile memory in the router. After the backup routing engine takes over for the primary routing engine or the single routing engine reboots, the backup routing engine or the single routing engine maintains neighbor relationships based on the neighbor state information, obtains routing information based on the saved neighbor state information. The backup routing engine or the single routing engine then generates local routes based on the routing information, determines best routes based on the local routes, sends the best routes to the neighboring routers, and saves the best routes to local hardware.

主权项

1. A method for a router comprising a primary routing engine and a backup routing engine to implement non-stop routing of a routing protocol, the method comprises:
when the primary routing engine is operating normally, the primary routing engine backing up neighbor state information to the backup routing engine; and when the backup routing engine takes over for the primary routing engine, the backup routing engine:
maintaining neighbor relationships based on the neighbor state information;obtaining routing information based on the neighbor state information saved locally at the backup routing engine;generating local routes based on the routing information;determining best routes based on the local routes;sending the best routes to neighboring routers; andsaving the best routes to local hardware.