Cisco IOS Cookbook, 2nd Edition

Redistributing Routes Using Route Maps

Problem

You want to use route maps for more detailed control over how RIP redistributes routing information from other sources.

Solution

Route maps give you much better control over how RIP redistributes external routes. This example uses static routes, but the same principles apply when redistributing routes from other protocols:

Router1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router1(config)#ip route 192.168.10.0 255.255.255.0 172.22.1.4
Router1(config)#ip route 192.168.11.0 255.255.255.0 172.22.1.4
Router1(config)#ip route 192.168.12.0 255.255.255.0 172.22.1.4
Router1(config)#access-list 20 permit 192.168.10.0
Router1(config)#access-list 21 permit 192.168.11.0
Router1(config)#route-map STATIC permit 10
Router1(config-route-map)#match ip address 20
Router1(config-route-map)#set metric 2
Router1(config-route-map)#set tag 2
Router1(config-route-map)#exit 
Router1(config)#route-map STATIC permit 20
Router1(config-route-map)#match ip address 21
Router1(config-route-map)#set metric 8
Router1(config-route-map)#route-map STATIC deny 30
Router1(config-route-map)#exit
Router1(config)#router rip
Router1(config-router)#redistribute static route-map STATIC
Router1(config-router)#exit
Router1(config)#end
Router1#

Discussion

In this example, we want RIP to distinguish among the different routes. There are two parameters that we can change, the metric and the route tag. We have already discussed metrics, which basically ...