Linux 3.9 routing oddity

Sander Steffann sander at
Sat Jul 6 09:36:46 CEST 2013

Hi Hannes,

>> "We didn't find an RFC that tells us to build a working implementation, so we decided not to..."
> Of coure I did notice the misbehaviour if we compile without
> CONFIG_IPV6_ROUTER_PREF and am working on a solution. I hoped to send
> out a second patch soon after the first one, but it became more subtle
> (and meanwhile lack time until the end of the weekend :( ).

Thanks, good to hear that! I got the impression that it wouldn't be fixed.

> This is a more complex issue to fix as I did not want to break the
> round-robin selection of routes with unkown nud states in the default
> router list. Also I am looking to resolve some usability issues: on
> executing ``ip route get'' we actually do trigger active nud validation
> on the nexthops. This could be a PITA because we do actually change the
> results by that (a second ``ip route get'' could yield different results).

Yeah, 'get' commands with side effects can really confuse people. They would confuse me :)

>>> So I assume that the bug would still be there.
>> Sigh...
> I'll keep you notified as soon as I have a working solution.

Thank you! Sorry for my remark earlier, I misjudged the situation.


More information about the ipv6-ops mailing list