Hello,
I was wondering if this would work. My task is to advertise routes from my AS and AS 400 and to let AS 400 communicate with other ASs through my AS. Other ASs (three of them - 100, 200 and 300) cannot use my network as a transit network in any other case. Routers connected directly to AS 200 and 300 have the same configuration.
RA(config-router)# neighbor 3.3.3.2 remote-as 100
RA(config-router)# neighbor 3.3.3.2 route-map SET_OUTBOUND_TRAFFIC in
RA(config-router)# neighbor 3.3.3.2 route-map SET_INBOUND_TRAFFIC out
RA(config-router)# neighbor 3.3.3.2 advertise-map ADVERTISE
RA(config-router)# exit
RA(config)# ip as-path access-list 1 permit ^400$
RA(config)# ip as-path access-list 1 permit ^$
RA(config)# route-map SET_OUTBOUND_TRAFFIC permit 10
RA(config-route-map)# set local-preference 200
RA(config-route-map)# exit
RA(config)# route-map ADVERTISE permit 10
RA(config-route-map)# match as-path 1
RA(config-route-map)# exit
RA(config)# route-map SET_INBOUND_TRAFFIC permit 10
RA(config-route-map)# match as-path 1
RA(config-route-map)# exit
Thanks.
