Linux IPv6 routing strange behaviour

Max Tulyev maxtul at
Wed Aug 14 18:57:49 CEST 2013

On 14.08.13 17:09, Jeroen Massar wrote:
>>> On the same box? Are they using the same routing table? I am fairly
>>> confident that will end up in a fight.
>> No! Some boxes have Quagga, some - Bird, not together of course.
> And are these boxes interconnected and are they thus possibly forwarding
> the information to each other?

Sure. It is interconnected, and routes are distributed from route

>> The prefixes from the global IPv6 routing table. It should be one
>> routing entry per route, but have the lot of totally same route strings.
> Your view on 'global' will be different than that from any other person
> depending on the peers you have, configuration settings and lots lots more.


> People cause bugs? And if the path does not contain repeated ASNs it
> will nicely loop till something stops it.

But how it can affect to SAME routes duplication in the FIB?

>> Which logs can explain something?
> The ones on your hosts? The ones generated by the tools that apparently
> break.

Nothing in /var/log/messages, Quagga/BIRD shows nothing interesting as
well. No errors, no warnings.

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