router bgp MYAS
  no synchronization
  bgp router-id MYLOOPBACK
  no bgp enforce-first-as
  bgp log-neighbor-changes
  network MY.NET.PREF.0 mask 255.255.255.0

  neighbor 91.240.225.1 remote-as 59428
  neighbor 91.240.225.1 send-community
  neighbor 91.240.225.1 soft-reconfiguration inbound
  neighbor 91.240.225.1 route-map RM-IX-import in
  neighbor 91.240.225.1 route-map RM-IX-export out
  no auto-summary

ip route MY.NET.PREF.0 255.255.255.0 Null0 250
ip bgp-community new-format


ip prefix-list PL-default seq 10 permit 0.0.0.0/0
!
ip prefix-list PL-bogon seq 5 permit 0.0.0.0/0 ge 32
ip prefix-list PL-bogon seq 10 permit 127.0.0.0/8 le 32
ip prefix-list PL-bogon seq 15 permit 10.0.0.0/8 le 32
ip prefix-list PL-bogon seq 20 permit 172.16.0.0/12 le 32
ip prefix-list PL-bogon seq 25 permit 192.168.0.0/16 le 32
ip prefix-list PL-bogon seq 30 permit 192.0.2.0/24 le 32
ip prefix-list PL-bogon seq 35 permit 128.0.0.0/16 le 32
ip prefix-list PL-bogon seq 40 permit 191.255.0.0/16 le 32
ip prefix-list PL-bogon seq 45 permit 192.0.0.0/24 le 32
ip prefix-list PL-bogon seq 50 permit 223.255.255.0/24 le 32
ip prefix-list PL-bogon seq 55 permit 224.0.0.0/3 le 32
ip prefix-list PL-bogon seq 60 permit 169.254.0.0/16 le 32
!
ip prefix-list PL-all seq 5 permit 0.0.0.0/0 le 32
!
ip prefix-list PL-mynet seq 10 permit MY.NET.PREF.0/24
!


!=== пример привязки community к анонсу своих префиксов,
!=== ниже добавляется community "не анонсировать 
!=== префиксы из листа PL-mynet для AS12345"

route-map RM-IX-export permit 10
  match ip address prefix-list PL-mynet
  set community 0:12345
!


route-map RM-IX-import deny 10
  match ip address prefix-list PL-default
!
route-map RM-IX-import deny 20
  match ip address prefix-list PL-bogon
!
route-map RM-IX-import permit 30
  match ip address prefix-list PL-all