Juniper JUNOSE 11.2.X BGP AND MPLS User Manual

• The new route map is applied to all routes that are subsequently placed in the IP routing
table. To apply the new table map to routes that are already present in the IP routing
table, you must refresh the IP routing table with the clear ip routes * command or the
clear ip bgp * command (this command will bounce the BGP sessions).
• Example
host1(config-router)#table-map distmet1
host1(config-router)#exit
host1(config)#exit
host1#clear ip routes *
• Use the no version to halt application of the route map.
• See table-map.
For example, suppose you want to change the distance and metric attributes to particular
values for routes advertised by a members of a particular community. The show ip route
bgp command indicates that the routes currently in the table have a variety of values for
these attributes:
host1#show ip route bgp
Protocol/Route type codes:
I1- ISIS level 1, I2- ISIS level2,
I- route type intra, IA- route type inter, E- route type external,
i- metric type internal, e- metric type external,
O- OSPF, E1- external type 1, E2- external type2,
N1- NSSA external type1, N2- NSSA external type2
Prefix/Length Type Next Hop Dist/Met Intf
------------------ ------- --------------- -------------- ------------
10.100.3.3/32 Bgp 10.12.12.1 20/0 ATM5/1.12
10.63.42.23/32 Bgp 10.45.2.31 12/5 ATM5/1.14
The following commands demonstrate how you can apply the policy to change these
values:
host1(config)#route-map distmet1 permit 5
host1(config-route-map)#match community boston42
host1(config-route-map)#set distance 33
host1(config-route-map)#set metric 44
host1(config-route-map)#exit
host1(config)#router bgp 100
host1(config-router)#table-map distmet1
host1(config-router)#exit
host1(config)#exit
host1#clear ip routes *
The show ip route bgp command reveals the new values:
host1#show ip route bgp
Protocol/Route type codes:
I1- ISIS level 1, I2- ISIS level2,
I- route type intra, IA- route type inter, E- route type external,
i- metric type internal, e- metric type external,
O- OSPF, E1- external type 1, E2- external type2,
N1- NSSA external type1, N2- NSSA external type2
Prefix/Length Type Next Hop Dist/Met Intf
------------------ ------- --------------- -------------- ------------
10.100.3.3/32 Bgp 10.12.12.1 33/44 ATM5/1.12
10.63.42.23/32 Bgp 10.45.2.31 33/44 ATM5/1.14
81Copyright © 2010, Juniper Networks, Inc.
Chapter 1: Configuring BGP Routing

Juniper JUNOSE 11.2.X BGP AND MPLS Specifications

General

Brand	Juniper
Model	JUNOSE 11.2.X BGP AND MPLS
Category	Software
Language	English