| Device Online Help |
|
Software can learn several routes to a given destination network through several protocols. If the alternate route is enabled, it stores all of these routes sorted in order of preference/cost. The best route according to the preference/cost is used for the data forwarding. The remaining routes are referred to as alternate routes.
To avoid traffic interruption, the alternative-route feature can be enabled globally to replace best routes with the next-best route if the best route becomes unavailable. The alternate route concept is applied between routing protocols; for example if an OSPF route becomes unavailable and an alternate RIP route is available it is immediately activated without waiting for an update interval to expire.
|
|