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>