Specifications

Configuring BGP
BGP Configuration Examples
IPC-334
Cisco IOS IP Configuration Guide
set local-preference 25
set metric 127
set weight 30000
set next-hop 192.92.68.24
set origin igp
!
access-list 1 permit 131.108.0.0 0.0.255.255
access-list 1 permit 160.89.0.0 0.0.255.255
access-list 1 permit 198.112.0.0 0.0.127.255
It is proper behavior to not accept any autonomous system path not matching the match clause of the
route map. This behavior means that you will not set the metric and the Cisco IOS software will not
accept the route. However, you can configure the software to accept autonomous system paths not
matched in the match clause of the route-map router configuration command by using multiple maps
of the same name, some without accompanying set commands.
route-map fnord permit 10
match as-path 1
set local-preference 5
!
route-map fnord permit 20
match as-path 2
The following example shows how you can use route maps in a reverse operation to set the route tag (as
defined by the BGP/OSPF interaction document, RFC 1403) when exporting routes from BGP into the
main IP routing table:
router bgp 100
table-map set_ospf_tag
!
route-map set_ospf_tag
match as-path 1
set automatic-tag
!
ip as-path access-list 1 permit .*
The following example shows how the route map named set-as-path is applied to outbound updates to
the neighbor 200.69.232.70. The route map will prepend the autonomous system path “100 100” to
routes that pass access list 1. The second part of the route map is to permit the advertisement of other
routes.
router bgp 100
network 171.60.0.0
network 172.60.0.0
neighbor 200.69.232.70 remote-as 200
neighbor 200.69.232.70 route-map set-as-path out
!
route-map set-as-path 10 permit
match address 1
set as-path prepend 100 100
!
route-map set-as-path 20 permit
match address 2
!
access-list 1 permit 171.60.0.0 0.0.255.255
access-list 1 permit 172.60.0.0 0.0.255.255
!
access-list 2 permit 0.0.0.0 255.255.255.255