[PATCH v7] Babel: Replace internal route selection by bird's nest

Lars Gierth larsg at systemli.org
Thu Jan 8 02:00:11 CET 2026


Good point, will do!

On 1/7/26 14:13, Toke Høiland-Jørgensen wrote:
> Lars Gierth via Bird-users <bird-users at network.cz> writes:
> 
>> This introduces the ability to filter routes from specific interfaces and
>> neighbours. With the current internal route selection proto babel exports
>> only up to one route and an admin cannot do fine-grained filtering.
>>
>> To fix this we rip out the internal route selection entirely and export
>> evey babel route as a distinct route into the bird's nest instead.
>>
>> In the presence of esoteric route filters this change may be observable by
>> users however we feel the additional filtering power is more important. A
>> release note entry for this change is recommended.
>>
>> Co-developed-by: Daniel Gröber <dxld at darkboxed.org>
>> Signed-off-by: Daniel Gröber <dxld at darkboxed.org>
>> Co-developed-by: Lars Gierth <larsg at systemli.org>
>> Signed-off-by: Lars Gierth <larsg at systemli.org>
> 
> FWIW, I totally support getting this merged. It would be nice to update
> the documentation as well, though, maybe provide some examples of the
> kind of filtering you're doing? :)
> 
> -Toke



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