Indirect Specification: "Eyeballing" is Tricky



   Bad: Specifying Policy with Mechanism

neighbor 10.0.0.1 route-map EXPORT-A out
neighbor 192.168.0.1 route-map IMPORT-C in
...
ip community-list 1 permit 0:1000
...
route-map IMPORT-C permit 10
  set community 0:1000
!
...
route-map EXPORT-A permit 10
  match community 1
!