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Anders Hansen anders at oiu.dk
Sat Feb 1 13:03:31 CET 2020


I suppose I must be doing something wrong then :)
Here's the output from the commands:

birdc show ospf state
BIRD 2.0.7 ready.
area 0.0.0.0
router 10.255.255.11
distance 0
router 10.255.255.201 metric 1
stubnet 2a09:4c2:1f:ffff::/128 metric 0
stubnet 2a09:4c2:1f:ff:91::/127 metric 1
router 10.255.255.201
distance 1
router 10.255.255.11 metric 1
stubnet 2a09:4c2:1f:ff:ff::201/128 metric 1
stubnet 2a09:4c2:1f:ff:91::/127 metric 1

birdc show interfaces (all other interfaces than loopback0 has been left
out)
BIRD 2.0.7 ready.
<snip>
loopback0 up (index=3)
MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500
2a09:4c2:1f:ffff::/128 (Preferred, scope univ)
fe80::500e:2eff:feb5:8b1d/64 (Preferred, scope link)
<snip>

ip addr show (all other interfaces than loopback0 has been left out)
<snip>
3: loopback0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN group default qlen 1000
    link/ether 52:0e:2e:b5:8b:1d brd ff:ff:ff:ff:ff:ff
    inet6 2a09:4c2:1f:ffff::/128 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::500e:2eff:feb5:8b1d/64 scope link
       valid_lft forever preferred_lft forever
<snip>

Best Regards
Anders Hansen


On Fri, Jan 31, 2020 at 10:54 PM Ondrej Zajicek <santiago at crfreenet.org>
wrote:

> On Fri, Jan 31, 2020 at 09:58:23PM +0100, Anders Hansen wrote:
> > Hi list
> >
> > I'm having issues with a Debian 10 based router running BIRD 2.0.7.
> >
> > On the router I have several interfaces where OSPFv3 is active. All good.
> > Besides those interfaces, i also have a dummy interface named loopback0.
> >
> > Config example:
> >         area 0 {
> >                 interface "ens*" {
> >                         type ptp;
> >                         cost 1;
> >                         hello 5;
> >                 };
> >                 interface "loopback0" {
> >                         stub;
> >                         cost 1;
> >                 };
> >         };
> >
> > The ens interfaces work just fine. However, the /128 I have configured on
> > the loopback0 interfaces is constantly not being picked up by BIRD. It's
> > like BIRD completely ignores the existence of that interface. It simply
> > won't announce that /128 out to its peers connected through the ens
> > interfaces. If i change the /128 to a /127 instead, the prefix is
> > advertised by bird.
>
> Hi
>
> Works for me. What is reported by 'birdc show ospf state',
> 'birdc show interfaces' and 'ip addr show' commands ?
>
> --
> 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."
>
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