bird.conf

protocol bgp core_nyiix_14 from core4 {
  description "Neptune Networks - Telehouse core";
  local 169.254.253.1 as 397143;
  neighbor 169.254.253.2 as 397143;
}

template bgp core4 {
  hold time 90;
  keepalive time 30;
  graceful restart;

  ipv4 {
    next hop self;

    import keep filtered;

    import filter {
      if is_v4_bogon() then reject;
      if is_v4_default() then reject;
      krt_prefsrc=23.157.160.1;
      accept;
    };

    export filter {
      if is_v4_bogon() then reject;
      if is_v4_default() then reject;
      if is_v4_peering_net() then reject;
      if is_v4_neptune_networks() then accept;
      if source = RTS_BGP then accept;
      reject;
    };
  };
}

function is_v4_bogon() {
  return net ~ [
    0.0.0.0/8+,       # RFC 1122 'this' network
    10.0.0.0/8+,      # RFC 1918 private space
    100.64.0.0/10+,   # RFC 6598 Carrier grade nat space
    127.0.0.0/8+,     # RFC 1122 localhost
    169.254.0.0/16+,  # RFC 3927 link local
    172.16.0.0/12+,   # RFC 1918 private space
    192.0.2.0/24+,    # RFC 5737 TEST-NET-1
    192.88.99.0/24+,  # RFC 7526 6to4 anycast relay
    192.168.0.0/16+,  # RFC 1918 private space
    198.18.0.0/15+,   # RFC 2544 benchmarking
    198.51.100.0/24+, # RFC 5737 TEST-NET-2
    203.0.113.0/24+,  # RFC 5737 TEST-NET-3
    224.0.0.0/4+,     # multicast
    240.0.0.0/4+      # reserved
  ];
}

function is_v4_default () {
  return net = 0.0.0.0/0;
}

function is_v4_peering_net () {
  return net ~ [
    198.32.160.0/23+,  # NYIIX
    185.1.119.0/24+,   # LocIX
    193.189.82.0/23+   # KleyReX
  ];
}

function is_v4_neptune_networks () {
  if is_v4_internal_neptune_networks() then return true;
  if is_v4_external_neptune_networks() then return true;
  return false;
}

function is_v4_internal_neptune_networks () {
  return net ~ [
    23.157.160.0/24{25,32}
  ];
}

function is_v4_external_neptune_networks () {
  return net ~ [
    23.157.160.0/24
  ];
}