But this filter applies in the antenna that advertise the route.
10.20.2.2 and 10.20.2.36 advertise 10.0.0.0/8
10.20.2.162 and 10.20.3.1 links with 10.20.2.2 and i want that 10.20.2.162
uses 10.20.2.36 (not direct link) for 10.0.0.0/8 not 10.20.2.2 and
10.20.3.1 uses 10.20.2.2
So i need to modify in 10.20.2.162 and 10.20.3.1 the 10.0.0.0/8 gateway
Is this possible with babel?
Thanks
Oriol
El El jue, 12 ene 2023 a las 16:11, Juliusz Chroboczek <j...@irif.fr>
escribió:
> > We have a series of wireless antennas deployed in mesh with the babel
> > protocol using bird.
> > Two of those antennas advertise the route 10.0.0.0/8.
> > The rest of the antennas choose one of the two outputs depending on
> the
> > babel protocol.
> > How can I force it to go out through one or the other exit?
>
> You cannot force it, but you can strongly discourage one of the two nodes.
> Say something like this:
>
> filter babel_discourage {
> if babel_metric < 1024 then
> babel_metric = 1024;
> accept "ok";
> };
>
> protocol babel {
> ...
> ipv4 {
> export filter babel_discourage;
> };
> ipv6 {
> export filter babel_discourage;
> };
> };
>
> You should not do the opposite: a node can safely increase the metric it
> announces, thus discouraging its use by other nodes, but it should not
> decrease its metric artificially, since that might defeat Babel's loop
> avoidance.
>
> -- Juliusz
>
