-
Access global configuration
mode.
device# configure terminal
-
Define the matching conditions
for the extended community.
device(config)# ip extcommunity-list 1 permit rt 123:2
This example specifies that community list 1 permits routes from network 2 in
autonomous system 123.
-
Access BGP configuration mode.
device(config)# router bgp
-
Specify the autonomous system in
which your device resides.
device(config-bgp-router)# local-as 1000
-
Specify the autonomous system in
which the remote neighbor resides.
device(config-bgp-router)# neighbor 10.1.2.3 remote-as 1001
-
Access IPv4 address family
configuration mode.
device(config-bgp-router)# address-family ipv4 unicast
-
Enable the exchange of
information with the neighbor.
device(config-bgp-ipv4u)# neighbor 10.1.2.3 activate
-
Apply a route map to incoming
routes.
device(config-bgp-ipv4u)# neighbor 10.1.2.3 route-map in extComRmapt
This example uses the in keyword to apply route map
extComRmapt.
-
Apply a route map to outgoing
routes.
device(config-bgp-ipv4u)# neighbor 10.1.2.3 route-map out sendExtComRmap
This example uses the out keyword to apply route map
sendExtComRmap.
-
Enable the sending of standard
and extended attributes in updates to the specified BGP neighbor.
device(config-bgp-ipv4u)# neighbor 10.1.2.3 send-community both
This example uses the send-community both keywords.
The following example summarizes the commands in
this procedure.
device# configure terminal
device(config)# ip extcommunity-list 1 permit rt 123:2
device(config)# router bgp
device(config-bgp-router)# local-as 1000
device(config-bgp-router)# neighbor 10.1.2.3 remote-as 1001
device(config-bgp-router)# address-family ipv4 unicast
device(config-bgp-ipv4u)# neighbor 10.1.2.3 activate
device(config-bgp-ipv4u)# neighbor 10.1.2.3 route-map in extComRmapt
device(config-bgp-ipv4u)# neighbor 10.1.2.3 route-map out sendExtComRmap
device(config-bgp-ipv4u)# neighbor 10.1.2.3 send-community both
