! r1: AS65001. Peers with ferrix (AS65000) and r2 (AS65002).
! Applies policy on routes from ferrix based on the communities students set:
!   NO_EXPORT (65535:65281)   standard: not sent to r2 (FRR honours it)
!   65001:100                 r1 prepends its own ASN three times
!   BLACKHOLE (65535:666)     dropped at r1
frr defaults traditional
hostname r1
log stdout
!
ip route 192.0.2.0/24 Null0
!
bgp community-list standard PREPEND-ME permit 65001:100
bgp community-list standard BLACKHOLE permit 65535:666
!
route-map FROM-FERRIX deny 10
 match community BLACKHOLE
!
route-map FROM-FERRIX permit 20
 match community PREPEND-ME
 set as-path prepend 65001 65001 65001
!
route-map FROM-FERRIX permit 30
!
route-map PERMIT-ALL permit 10
!
router bgp 65001
 bgp router-id 10.200.0.2
 no bgp ebgp-requires-policy
 no bgp network import-check
 neighbor 10.200.0.1 remote-as 65000
 neighbor 10.200.0.1 description ferrix
 neighbor 10.200.0.1 timers 10 30
 neighbor 10.200.0.3 remote-as 65002
 neighbor 10.200.0.3 description r2
 neighbor 10.200.0.3 timers 10 30
 !
 address-family ipv4 unicast
  network 192.0.2.0/24
  neighbor 10.200.0.1 route-map FROM-FERRIX in
  neighbor 10.200.0.1 route-map PERMIT-ALL out
  neighbor 10.200.0.3 route-map PERMIT-ALL in
  neighbor 10.200.0.3 route-map PERMIT-ALL out
 exit-address-family
!