Cisco Systems 78-11741-02 manual BGP Route Map Examples, IPC-333

Configuring BGP

BGP Configuration Examples

•BGP Prefix List Filtering Examples

•BGP Soft Reset Examples

•BGP Synchronization Examples

•BGP Path Filtering by Neighbor Examples

•BGP Aggregate Route Examples

•BGP Community with Route Maps Examples

•BGP Conditional Advertisement Configuration Examples

•BGP Confederation Examples

•BGP Peer Group Examples

•TCP MD5 Authentication for BGP Examples

BGP Route Map Examples

The following example shows how you can use route maps to modify incoming data from a neighbor. Any route received from 140.222.1.1 that matches the filter parameters set in autonomous system access list 200 will have its weight set to 200 and its local preference set to 250, and it will be accepted.

router bgp 100

!

neighbor 140.222.1.1 route-map FIX-WEIGHT in neighbor 140.222.1.1 remote-as 1

!

ip as-path access-list 200 permit ^690$ ip as-path access-list 200 permit ^1800

!

route-map FIX-WEIGHT permit 10 match as-path 200

set local-preference 250 set weight200

In the following example, the route map named freddy marks all paths originating from autonomous system 690 with an MED metric attribute of 127. The second permit clause is required so that routes not matching autonomous system path list 1 will still be sent to neighbor 1.1.1.1.

router bgp 100

neighbor 1.1.1.1 route-map freddy out

!

ip as-path access-list 1 permit ^690_ ip as-path access-list 2 permit .*

!

route-map freddy permit 10 match as-path 1

set metric 127

!

route-map freddy permit 20 match as-path 2

The following example shows how you can use route maps to modify redistributed information from the IP forwarding table:

router bgp 100

redistribute igrp 109 route-map igrp2bgp

!

route-map igrp2bgp match ip address 1

Cisco IOS IP Configuration Guide

IPC-333