ESR Series Routers Operation Manual
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7.16
PBR routing policy configuration
7.16.1
Route-map for BGP configuration
Route-maps may serve as filters processing routing information when it is received from or sent to
the neighbouring device. Processing may include filtering based on various route criteria and setting
attributes (MED, AS-PATH, community, LocalPreference, etc.) for the respective routes.
Also, Route-map may assign routes based on access control lists (ACL).
Fig. 7.17
—
Network structure
Objective 1:
Assign community for routing information coming from AS 20:
First, do the following:
–
Configure BGP with AS 2500 on ESR router
–
Establish neighbouring with AS20.
Solution:
Create a policy:
esr#
configure
esr(config)#
route-map from-as20
Create rule 1:
esr(config-route-map)#
rule 1
If AS PATH contains AS 20, assign community 20:2020 to it and exit:
esr(config-route-map-rule)#
match as-path contain 20
esr(config-route-map-rule)#
action set community 20:2020
esr(config-route-map-rule)#
exit
esr(config-route-map)#
exit
In AS 2500 BGP process, enter neighbour parameter configuration:
esr(config)#
router bgp 2500
esr(config-bgp)#
neighbor 185.0.0.2
