h1. BGP

Nous utilisons BIRD sous Linux comme routeur BGP

http://bird.network.cz/

h1. Liens

* http://www.cl.cam.ac.uk/~tgg22/talks/BGP_TUTORIAL_ICNP_2002.ppt

h1. Configuration Toulouse

<pre>

router id 91.224.148.2;

define myas = 197422;

protocol device {

	scan time 10;

        primary "eth0" 91.224.148.3;

}

protocol static static_bgp {

	import all;

	route 91.224.148.0/23 reject;

}

protocol kernel{

	import all;

	export all;

}

function avoid_martians()

prefix set martians;

{

  martians = [ 169.254.0.0/16+, 172.16.0.0/12+, 192.168.0.0/16+, 10.0.0.0/8+, 224.0.0.0/4+, 240.0.0.0/4+ ];

  # Avoid 0.0.0.0/X

  if net.ip = 0.0.0.0 then return false;

  # Avoid too short and too long prefixes

  if (net.len < 8) || (net.len > 24) then return false;

  # Avoid RFC1918 networks

  if net ~ martians then return false;

  return true;

}

filter bgp_OUT {

	if (net ~ [91.224.148.0/23]) then accept;

	else reject;

}

protocol bgp TOUIX {

        local as myas;

        neighbor 91.213.236.1 as 47184;

        preference 200;

        import where avoid_martians();

        export filter bgp_OUT;

}

protocol bgp JAGUAR {

	 local as myas;

	 neighbor 31.172.233.1 as 30781;

	 preference 50;

         import where avoid_martians();

         export filter bgp_OUT;

}

protocol bgp TETANEUTRAL {

	local as myas;

	neighbor 91.224.148.2 as myas;

	preference 100;

	import where avoid_martians();

	export all;

}

</pre>