bird ospf and ipv6

[Ondrej Zajicek]

On Thu, Mar 03, 2011 at 04:20:34PM +0100, fredrik danerklint wrote:
> Hi!
> 
> I have compiled bird from git with "git clone git://git.nic.cz/bird.git" on 
> FreeBSD 8.2. (btw, why is the version on that 1.2.3 according to 
> sysdep/config.h when there is an 1.2.5 release?)

Because last two versions were branches (with cherrypicked patches),
so the trunk version was not updated.

> I've got ospf running on ipv4 between this machine and a OpenBSD-curent 
> running OpenOSPF.
>  
> They both can see eachother and also their lo1loopback interface where there 
> is an ipaddress of an /32 net which ends on OpenOSPF with .1 and .4 on the 
> bird. There is also an /128 net for the ipv6 part. 

Could you send me an output of 'ip a l' to get list of addresses,
'birdc show interfaces' and 'birdc show ospf state' ?

> This addresses is ping-able from both machine so the route does exists as 
> expected.
> 
> Now, I took that working configuration of bird and changed it to bird6.
> 
> protocol ospf o6 {
>        tick 2;
>         area 0.0.0.0 {
>                 interface "vlan15" {
>                         hello 3;
>                         cost 7;
>                 };
>                 interface "lo1" {
>                     stub yes;
>                     cost 1;
>                 };
>         };
> }
> 
> Bird can see and do inject the routes from OpenOSPF but can't see (?) the 
> routes from bird6.
> 
> bird> show route 
> 2a03:xxxx:xxxx::xxxx:f01/128 via fe80::1e6f:65ff:fe81:c4ef on vlan15 [o6 
> 15:53] * I (150/7) [xx.xx.xx.1]
> 2a03:xxxx:xxxx::xxxx:fc0/127 via fe80::1e6f:65ff:fe81:c4ef on vlan15 [o6 
> 15:53] * I (150/7) [xx.xx.xx.1]
> 2a03:xxxx:xxxx::xxxx:fd0/127 dev vlan15 [o6 15:48] * I (150/7) [xx.xx.xx.4]
> bird> quit
> 
> Now, why is bird6 showing that the routes should route via the link-local 
> addresses? 

That is a standard behavior for OSPFv3 (IPv6).

> If bird6 is announcing that to OpenOSPF I can see that it won't add 
> that route.

In OSPF (compared to BGP or RIP) routes are not announced to peers, link
state is announced. Each router then computes all its routes based on
shared complete link state (which can be shown using 'show ospf state'
bird command).

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago at 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."
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 197 bytes
Desc: Digital signature
URL: <http://trubka.network.cz/pipermail/bird-users/attachments/20110306/b72ec950/attachment-0001.asc>