Temporarily announcing more specific prefix?

[Robert Sander]

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

Tel: 030 / 405051-43
Fax: 030 / 405051-19

Zwangsangaben lt. §35a GmbHG:
HRB 93818 B / Amtsgericht Berlin-Charlottenburg,
Geschäftsführer: Peer Heinlein -- Sitz: Berlin

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