Notes: In order to change the route-target of prefixs coming in, create a route-map setting the extcommunity rt to the new rt. Then under the vrf use "export map ", don't apply the route-map to the neighbor.
Config:
ip vrf RED
rd 100:1
export map RT
route-target export 100:1
route-target import 100:1
!
ip prefix-list 100 seq 5 permit 100.100.100.0/24
!
ip prefix-list 200 seq 5 permit 100.100.200.0/24
logging alarm informational
!
route-map RT permit 20
match ip address prefix-list 100
set extcommunity rt 100:100
!
route-map RT permit 30
match ip address prefix-list 200
set extcommunity rt 100:200
!
route-map RT permit 40
set extcommunity rt 100:1
!
