Another newbie question: Creating BGP prefixes in a filter

[Elmar K. Bins]

Hi Maria,

thank you for the superfast response, that I kind of seem to have slept through
;-)

So what you mean is creating the /24 route in "static" (possibly in an if
statement) and then matching it later?

I'll try this. The setup is really simple enough.

Thanks,
        Elmar.


maria.matejka at nic.cz (Maria Matějka) wrote:

> Hello,
> Prefix aggregation is currently not supported. It's quite a lot of work to do it properly.
> As a workaround, you may export these routes to an auxiliary kernel table, run an external script to maintain the aggregated route and learn the result back to BIRD. Or you can simply use the static protocol if your use case is simple enough.
> Maria
>
> On June 20, 2020 7:36:47 PM GMT+02:00, "Elmar K. Bins" <elmi at noir.de> wrote:
> >Hi guys,
> >
> >(status update: no solution for the OSPFv3 <--> IOS XR yet, no idea
> >where to look, both sides pretend to be happy but are not)
> >
> >So....
> >
> >I need to create a prefix to be BGP-advertised to peers and transits;
> >this
> >would look like:
> >
> >if (net = xxx/32) {
> > remove it and replace by yyy/zz;
> >}
> >
> >(more or less standard prefix aggregation on the border)
> >
> >
> >I could not find a hint of documentation in regard of doing a thing
> >like this,
> >where should I look?
> >
> >(We are currently forced to configure the wrong netmasks on loopback
> >addresses,
> >so BIRD has something to export)
> >
> >Yours,
> >	Elmar.
>