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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

set default interface — route-map

Synopsis

set default interface interface [...  interface]
no set default interface interface [...  interface]

Configures

Properties of routes matching a route map

Default

None

Description

This command sets the output interface for destinations that match the criteria in the route map if there is no explicit route to the destination. In other words, if the route is matched by this route map and has no explicit destination, this command can tell it which interface to use as a default route. This allows you to have different default routes for different hosts or networks.

You may list any number of interfaces; if the first interface in the list is down, the next is tried, and so on. This command should be used in conjunction with the ip policy route-map command.

Example

The following commands establish a route map named policy-one for policy-based routing. This map takes all packets for the destinations matched by access list 1 (i.e., all destinations that match 10.1.0.0/16) and sends them out through interface serial0.

interface ethernet0
  ip policy route-map policy-one
  ip address 10.1.1.1 255.255.255.0
!
! this access-list is for the match ip command below
access-list 1 permit 10.1.0.0 0.0.255.255
!
route-map policy-one
  match ip address 1
  set default interface serial0

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