Route matching filter not exported

Alexander Zubkov green at qrator.net
Fri May 17 18:56:55 CEST 2024


That looks different from the output in the first email. There best routes
were received not only from ibgp, but from the same peer, so it seems ok
that they were not sent back.
For this output you have now session with your ibgp peer eatablished, but
it still do not see the routes.
Localpref should not affect exporting directly, yes. It can alter the best
route, which will be considered for exporting.

On Fri, May 17, 2024, 18:36 Nico Schottelius <nico.schottelius at ungleich.ch>
wrote:

>
> Hello Alexander,
>
> the route is received via eBGP and should be redistributed via iBGP:
>
> bird> show route all 49.14.107.0/24
> Table master4:
> 49.14.107.0/24       unicast [outgoing_server120 16:13:14.594] * (100)
> [AS45271i]
>         via 2a0a:e5c0:31:4::1 on tun1
>         Type: BGP univ
>         BGP.origin: IGP
>         BGP.as_path: 209898 15576 3356 55644 45271
>         BGP.next_hop: 2a0a:e5c0:31:4::1 fe80::2010:be9e:ed5f:ea08
>         BGP.local_pref: 50
>         BGP.atomic_aggr:
>         BGP.aggregator: 10.100.230.241 AS65010
>         BGP.community: (3356,2) (3356,22) (3356,100) (3356,123) (3356,502)
> (3356,903) (3356,2112) (15576,100) (15576,102) (15576,1000)
>         BGP.otc: 209898
>                      unicast [outgoing_server121 16:13:14.700] (100)
> [AS45271i]
>         via 2a0a:e5c0:32:4::1 on tun0
>         Type: BGP univ
>         BGP.origin: IGP
>         BGP.as_path: 209898 15576 3356 55644 45271
>         BGP.next_hop: 2a0a:e5c0:32:4::1 fe80::5cd3:b71c:f90a:b469
>         BGP.local_pref: 50
>         BGP.atomic_aggr:
>         BGP.aggregator: 10.100.230.241 AS65010
>         BGP.community: (3356,2) (3356,22) (3356,100) (3356,123) (3356,502)
> (3356,903) (3356,2112) (15576,100) (15576,102) (15576,1000)
>         BGP.otc: 209898
>
> The only difference to other routers is that the bgp local preference is
> 50, but from my understanding it should still be exported via iBGP.
>
> BR,
>
> Nico
>
> Alexander Zubkov <green at qrator.net> writes:
>
> > OK, I see that routes you showed have best from protocol ibgp. So I
> suppose they received from ibgp peer, and your are
> > sending them to ibgp peer too. That is not allowed by default.
> >
> > On Fri, May 17, 2024, 17:00 Nico Schottelius <
> nico.schottelius at ungleich.ch> wrote:
> >
> >  Ciao Alexander,
> >
> >  Alexander Zubkov <green at qrator.net> writes:
> >
> >  > Hello,
> >  >
> >  > Just curious. You've done "reload out" to your session after changing
> >  > the filter, right?
> >
> >  this is a very good point, but in this case the whole bird daemon is
> >  restarted, so this should not be an issue.
> >
> >  BR,
> >
> >  Nico
>
> --
> Sustainable and modern Infrastructures by ungleich.ch
>
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