Temporarily announcing more specific prefix?

[Alexander Zubkov]

Hello,

You can use an additional table. And attach your and static protocols
bgp there. And do not pipe those prefixes to your main table.

On Thu, Sep 17, 2020 at 4:00 PM Robert Sander
<r.sander at heinlein-support.de> wrote:
>
> Hi,
>
> I have the task to configure BIRD to be able to announce a more specific
> prefix temporarily to our BGP peers.
>
> Currently we announce a /22 and want to be able to flip a switch and
> announce one /24 from that /22.
>
> As we partition the network internally I cannot use the prefixes learned
> for the BGP announcements.
>
> Currently there is one static protocol that contains the /22 and the
> export filter looks at the protocol name.
>
> I was thinking about setting up another static protocol and enable it if
> needed. But the /24 is also used internally and therefor the preferred
> route in the table, even when the static protocol is enabled. This means
> I cannot filter on the protocol name in the export filter. I cannot
> filter on the prefix itself as it must not be exported always.
>
> How do I achieve that?
>
> Regards
> --
> Robert Sander
> Heinlein Support GmbH
> Schwedter Str. 8/9b, 10119 Berlin
>
> http://www.heinlein-support.de
>
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