Redistributing Routes into EIGRP Using Route Maps

2017-11-03 09:05:04

Problem

You require greater control over the routes that are redistributed and their associated metrics and route tags.

Solution

You can use route maps to do more sophisticated redistribution of routes into EIGRP:

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 56 100 255 1 1500 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 128 200 255 1 1500 Router1(config-route-map)#exit Router1(config)#route-map STATIC deny 30 Router1(config-route-map)#exit Router1(config)#router eigrp 55 Router1(config-router)#redistribute static route-map STATIC Router1(config-router)#exit Router1(config)#end Router1#

Discussion

This recipe is extremely similar to Recipe 6.4 in the RIP chapter of this book. And just as in that example, we use route maps to set not only metrics, but also route tags for redistributed static routes. Please refer to Recipe 6.4 for a detailed discussion of how route maps work.

The one thing that you need to be careful of with EIGRP is that, as we discussed in Recipe 7.3, there is no default default-metric. So if you don't define EIGRP metrics for foreign routing protocols, EIGRP will not redistribute anything. This is not necessary for the static routes shown in the example, though.

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