[afnog] Private IP Filters in bgp

[Randy Bush]

i just looked at what i do in ios classic, and it is a bit perverse

    no ip prefix-list v4-bogons
    ip prefix-list v4-bogons permit 0.0.0.0/8 le 32
    ip prefix-list v4-bogons permit 10.0.0.0/8 le 32
    ip prefix-list v4-bogons permit 100.64.0.0/10 le 32
    ip prefix-list v4-bogons permit 127.0.0.0/8 le 32
    ip prefix-list v4-bogons permit 169.254.0.0/16 le 32
    ip prefix-list v4-bogons permit 172.16.0.0/12 le 32
    ip prefix-list v4-bogons permit 192.0.2.0/24 le 32
    ip prefix-list v4-bogons permit 192.168.0.0/16 le 32
    ip prefix-list v4-bogons permit 223.0.0.0/8 le 32
    ip prefix-list v4-bogons permit 224.0.0.0/3 le 32
    ...
    route-map ebgp4-in deny 1
      match ip address prefix-list v4-bogons

randy