<div dir="ltr"><div>i had put every link on a /30 so the session between two peer have a different network address for every link.<br><br></div>Thanks a lot for the help :)<br></div><div class="gmail_extra"><br><div class="gmail_quote">2018-03-07 18:23 GMT+01:00 Mattia Milani <span dir="ltr"><<a href="mailto:mattia.milani@studenti.unitn.it" target="_blank">mattia.milani@studenti.unitn.it</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>yeah that's right i can't ping H2 from H0 but H0 know only H1 it didn't try to reach H2 indeed when i try to ping H1.eth1 from H0.eth1 it works.<br></div><div>this nitht i will modify my program to have different networks an i will notify you if it works.<br><br></div><div>Another question, when it will be implemented Aggregation on BGP? have you planed it?<br><br></div><div>Thanks, Mattia<br></div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">2018-03-07 17:59 GMT+01:00 Daniel Suchy <span dir="ltr"><<a href="mailto:danny@danysek.cz" target="_blank">danny@danysek.cz</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
as Ondrej mentioned already, you have wrong basic network setup - you're<br>
using wrong network masks. H0 thinks, that all nodes (H1, H2, H3) ale in<br>
single directly-connected L2 network.<br>
<br>
To have BGP working, you need to have basic L3 connectivity working -<br>
that means, you must be able to ping each host (and this will not work<br>
in your setup). It's not a problem with Bird.<br>
<br>
With regards,<br>
Daniel<br>
<span><br>
<br>
On 03/07/2018 05:20 PM, Mattia Milani wrote:<br>
> all external interface of the peer belong to the same network, and the<br>
</span>> address of the network is <a href="http://10.0.0.0/8" rel="noreferrer" target="_blank">10.0.0.0/8</a> <<a href="http://10.0.0.0/8" rel="noreferrer" target="_blank">http://10.0.0.0/8</a>> that is unic.<br>
<span>><br>
> sorry for the network picture, i noted after had sended the email that<br>
> it get mangled.<br>
> now i try to explain it more clearly<br>
><br>
> H0 belong to AS2 and have the interface eth1 with the address <a href="http://10.0.0.1/8" rel="noreferrer" target="_blank">10.0.0.1/8</a><br>
</span>> <<a href="http://10.0.0.1/8" rel="noreferrer" target="_blank">http://10.0.0.1/8</a>> and it is connected with H1<br>
<span>> H1 belong to AS4 and have two interfaces:<br>
</span>> -eth1 with the address <a href="http://10.0.1.1/8" rel="noreferrer" target="_blank">10.0.1.1/8</a> <<a href="http://10.0.1.1/8" rel="noreferrer" target="_blank">http://10.0.1.1/8</a>> that is<br>
> connected with H0.eth1<br>
> -eth2 with the address <a href="http://10.0.1.2/8" rel="noreferrer" target="_blank">10.0.1.2/8</a> <<a href="http://10.0.1.2/8" rel="noreferrer" target="_blank">http://10.0.1.2/8</a>> that is<br>
<span>> connected with H2.eth2<br>
> H2 belong to AS3 and have two interfaces:<br>
</span>> -eth1 with the address <a href="http://10.0.2.1/8" rel="noreferrer" target="_blank">10.0.2.1/8</a> <<a href="http://10.0.2.1/8" rel="noreferrer" target="_blank">http://10.0.2.1/8</a>> that is<br>
> connected with H3.eth1<br>
> -eth2 with the address <a href="http://10.0.2.2/8" rel="noreferrer" target="_blank">10.0.2.2/8</a> <<a href="http://10.0.2.2/8" rel="noreferrer" target="_blank">http://10.0.2.2/8</a>> that is<br>
<span>> connected with H1.eth2<br>
> H3 belong to AS1 and have the interface eth1 with the address <a href="http://10.0.3.1/8" rel="noreferrer" target="_blank">10.0.3.1/8</a><br>
</span>> <<a href="http://10.0.3.1/8" rel="noreferrer" target="_blank">http://10.0.3.1/8</a>> and it is connected with H2<br>
<span>><br>
> i hope that this way to explain the network is more clearly<br>
><br>
> every interace is on the same network address so do you mean that every<br>
> bgp session between two peer need to have different network address?<br>
><br>
><br>
><br>
> 2018-03-07 17:01 GMT+01:00 Ondrej Zajicek <<a href="mailto:santiago@crfreenet.org" target="_blank">santiago@crfreenet.org</a><br>
</span>> <mailto:<a href="mailto:santiago@crfreenet.org" target="_blank">santiago@crfreenet.org</a><wbr>>>:<br>
<span>><br>
> On Wed, Mar 07, 2018 at 04:45:55PM +0100, Mattia Milani wrote:<br>
> > yeah they are a /8, so bird doesn't support /8?<br>
> > now i'll try to modify them.<br>
> ><br>
> > but sorry, why bird doesn't support /8?<br>
><br>
> BIRD of course supports /8 (and any other prefix lengths), but your<br>
> network setup have more networks with the same network prefix<br>
</span>> (<a href="http://10.0.0.0/8" rel="noreferrer" target="_blank">10.0.0.0/8</a> <<a href="http://10.0.0.0/8" rel="noreferrer" target="_blank">http://10.0.0.0/8</a>>), if i understand your network<br>
<span>> picture correctly (it get<br>
> mangled in mail). Such network setup is not generally correct.<br>
><br>
> --<br>
> Elen sila lumenn' omentielvo<br>
><br>
> Ondrej 'Santiago' Zajicek (email: <a href="mailto:santiago@crfreenet.org" target="_blank">santiago@crfreenet.org</a><br>
</span>> <mailto:<a href="mailto:santiago@crfreenet.org" target="_blank">santiago@crfreenet.<wbr>org</a>>)<br>
<span>> OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3,<br>
</span>> <a href="http://wwwkeys.pgp.net" rel="noreferrer" target="_blank">wwwkeys.pgp.net</a> <<a href="http://wwwkeys.pgp.net" rel="noreferrer" target="_blank">http://wwwkeys.pgp.net</a>>)<br>
<div class="m_-7611740884074705625HOEnZb"><div class="m_-7611740884074705625h5">> "To err is human -- to blame it on a computer is even more so."<br>
><br>
><br>
</div></div></blockquote></div><br></div>
</div></div></blockquote></div><br></div>