Introduction
Default routes are used to direct packets addressed to networks not explicitly listed in the routing table.
Default routes are invaluable in topologies where learning all the more specific networks is not desirable, as in case of stub networks, or not feasible due to limited system resources such as memory and processing power.

This document explains how to configure a default route, or gateway of last resort. These IP commands are used:

• ip default−gateway
• ip default−network
• and ip route 0.0.0.0 0.0.0.0