Linux IPv6 routing strange behaviour

Jeroen Massar jeroen at
Wed Aug 14 12:39:43 CEST 2013

On 2013-08-14 12:33, Max Tulyev wrote:
> Hi All,
> I see the strange behaviour of my Linux routers. There are quagga and
> bird with IPv6 BGP full view.

On the same box? Are they using the same routing table? I am fairly
confident that will end up in a fight.

> Quagga/bird reports about 13500 prefixes,
> but route table constantly grow up to 100000 routes and more.

Which prefixes, and who/what originates them?

Are you maybe causing a routing loop towards yourself?

> Some
> routes are duplicated 2,3,5 and even up to 20 times :( And after some
> time routing stops working completely, number of routes drops to about
> zero, and start to grow again.

You are aware that Linux is mostly meant as an end-user/server system,
not as a routing platform? There are a LOT of scalability problems in
the routing code as it was not designed for large scalability...

> Did anyone see something like that? How I can fix it?

Providing outputs/log files would be a good start for people to look at it.


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