all external interface of the peer belong to the same network, and the address of the network is 10.0.0.0/8 that is unic.

sorry for the network picture, i noted after had sended the email that it get mangled.

now i try to explain it more clearly

H0 belong to AS2 and have the interface eth1 with the address 10.0.0.1/8 and it is connected with H1

H1 belong to AS4 and have two interfaces:

-eth1 with the address 10.0.1.1/8 that is connected with H0.eth1

-eth2 with the address 10.0.1.2/8 that is connected with H2.eth2

H2 belong to AS3 and have two interfaces:

-eth1 with the address 10.0.2.1/8 that is connected with H3.eth1

-eth2 with the address 10.0.2.2/8 that is connected with H1.eth2

H3 belong to AS1 and have the interface eth1 with the address 10.0.3.1/8 and it is connected with H2

i hope that this way to explain the network is more clearly

every interace is on the same network address so do you mean that every bgp session between two peer need to have different network address?

2018-03-07 17:01 GMT+01:00 Ondrej Zajicek <santiago@crfreenet.org>:

On Wed, Mar 07, 2018 at 04:45:55PM +0100, Mattia Milani wrote:
> yeah they are a /8, so bird doesn't support /8?
> now i'll try to modify them.
>
> but sorry, why bird doesn't support /8?

BIRD of course supports /8 (and any other prefix lengths), but your
network setup have more networks with the same network prefix
(10.0.0.0/8), if i understand your network picture correctly (it get
mangled in mail). Such network setup is not generally correct.

--
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago@crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."