Introduction to Default Routing
The gateway of last resort is the term applied to a routing entry in the Cisco routing table that the router forwards packets to when it lacks a more specific route. The gateway of last resort can be learned from a route provided by another router that is tagged as candidate default by the advertising router. The ip default-network command is one way to make a router tag a route as a gateway of last resort.
The ip default-network xxx.xxx.xxx.xxx command causes a router to treat xxx.xxx.xxx.xxx as a gateway of last resort. A router can have multiple IP default networks entered.
The ip default-gateway command is used with routers that have IP routing disabled. It gives them an address to which they can ...
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