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BGP » Historique » Version 3

Laurent GUERBY, 18/12/2011 09:08

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h1. BGP
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Nous utilisons BIRD sous Linux comme routeur BGP
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http://bird.network.cz/
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h1. Evolutions de la conf BGP
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* http://lists.tetaneutral.net/pipermail/technique/2011-December/000118.html
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h1. Liens
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* http://www.cl.cam.ac.uk/~tgg22/talks/BGP_TUTORIAL_ICNP_2002.ppt
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h1. Configuration Toulouse
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<pre>
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router id 91.224.148.2;
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define myas = 197422;
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protocol device {
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	scan time 10;
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        primary "eth0" 91.224.148.3;
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}
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protocol static static_bgp {
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	import all;
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	route 91.224.148.0/23 reject;
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}
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protocol kernel{
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	import all;
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	export all;
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}
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function avoid_martians()
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prefix set martians;
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{
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  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+ ];
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  # Avoid 0.0.0.0/X
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  if net.ip = 0.0.0.0 then return false;
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  # Avoid too short and too long prefixes
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  if (net.len < 8) || (net.len > 24) then return false;
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  # Avoid RFC1918 networks
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  if net ~ martians then return false;
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  return true;
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}
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filter bgp_OUT {
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	if (net ~ [91.224.148.0/23]) then accept;
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	else reject;
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}
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protocol bgp TOUIX {
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        local as myas;
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        neighbor 91.213.236.1 as 47184;
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        preference 200;
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        import where avoid_martians();
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        export filter bgp_OUT;
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}
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protocol bgp JAGUAR {
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	 local as myas;
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	 neighbor 31.172.233.1 as 30781;
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	 preference 50;
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         import where avoid_martians();
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         export filter bgp_OUT;
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}
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protocol bgp TETANEUTRAL {
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	local as myas;
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	neighbor 91.224.148.2 as myas;
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	preference 100;
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	import where avoid_martians();
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	export all;
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}
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</pre>