BIRD 2.0.{7,10} MED not actually send for learned routes if export table on is set

[Ondrej Zajicek]

On Mon, Oct 17, 2022 at 09:03:04AM -0300, Douglas Fischer wrote:
> When using the MED-as-IGP-cost feature, shouldn't the MED be exported
> naturally?

You mean feature that would export IGP cost as MED? AFAIK we do not have
such feature. It is one thing planned.

> 
> Em dom., 16 de out. de 2022 às 23:11, Ondrej Zajicek via Bird-users <
> bird-users at trubka.network.cz> escreveu:
> 
> > On Sun, Oct 16, 2022 at 11:17:23AM +0200, Inrin via Bird-users wrote:
> > > Greetings,
> > >
> > > I noticed during setting up a peering that the MED is not actually send
> > > to my peer, although bird shows it in the export.
> > > We confirmed this via tcpdump on both ends.
> > >
> > > After debugging a bit, I noticed that this only affects “learned” routes
> > > but routes from the static protocol worked just fine.
> > >
> > > After disabling the “export table” feature, the MED was send out just
> > > fine.
> > >
> > > Is this behaviour expected?
> >
> > Hello
> >
> > It is not expected behavior. Note that MED on route exported to EBGP
> > should be removed, unless it is explicitly set in the export filter. I
> > suspect that with export table, the attribute set in the export filter is
> > considered mistakenly as 'old' instead of 'fresh' for the purpose of MED
> > removal test, as the route is stored in the export table in-between.
> >
> > --
> > 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."
> >
> >
> 
> -- 
> Douglas Fernando Fischer
> Engº de Controle e Automação

-- 
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."