Examples
Examples
Example A A route map that matches on a prefix-list and sets the route metrics
1.Create a prefix list that matches just 52.0.0.0/8
awplus(config)#ip prefix-list test1 permit 52.0.0.0/8
2.Then, create a route map to match on this prefix-list, and set the metric of matching routes to 665:
awplus(config)#route-map test1 permit 1 awplus(config-route-map)#match ip address prefix-list test1
awplus(config-route-map)#set metric 665
3.Configure the route-map to operate on incoming updates from neighbor 45.45.45.46 awplus(config-router)#neighbor 45.45.45.46 route-map test1 in
Example B Match on a prefix-list that denies an entry
1.Create a prefix list that excludes 52.0.0.0/8, then includes all other routes: awplus(config)#ip prefix-list test2 deny 52.0.0.0/8 awplus(config)#ip prefix-list test2 permit any
2.Create a route map to match on this prefix-list:
awplus(config)#route-map test2 permit 1 awplus(config-route-map)#match ip address prefix-list test2 awplus(config-route-map)#set metric 665
The route map is:
route-map test2, permit, sequence 1 Match clauses:
ip address prefix-list test2 Set clauses:
metric 665
3.Shut down the neighbor, and then bring it up again:
awplus(config-router)#neighbor 45.45.45.46 shutdown awplus(config-router)#neighbor 45.45.45.46 no shutdown
4.Check the route table. This time, the only route learnt from the peer is 45.0.0.0/8, and it still has metric 665. The prefix-list has explicitly matched all routes except 52.0.0.0/8, so all routes except 52.0.0.0/8 have been permitted by the first entry of the route map. Then 52.0.0.0/8 has been denied by the implicit deny-all entry at the end of the route map.
awplus#show ip route
Page 36 Use Route Maps and Other Filters to Filter and Alter BGP and OSPF Routes
