netdev - Re: IPV6 routing problem

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Message-ID: <CAJzFV34vJTCV+-rwH+TE1oB0qiUw1PuqgAWpm8U1Xe_xAv-_BA@mail.gmail.com>
Date:	Fri, 24 Jan 2014 11:50:35 -0700
From:	Sharat Masetty <sharat04@...il.com>
To:	Emmanuel Thierry <ml@...il.fr>,
	Sharat Masetty <sharat04@...il.com>, netdev@...r.kernel.org
Subject: Re: IPV6 routing problem

Thank you Emmanuel and Hannes, I went through the thread and the
suggested fix and it definitely makes sense. I will apply the fix and
test it out.

A general question, Can you suggest a good reference documentation to
understand the Linux kernel IPV6 routing and neighboring subsystem
better? The O Reilly book does not have much about IPV6.

Thanks
Sharat

On Fri, Jan 24, 2014 at 6:59 AM, Hannes Frederic Sowa
<hannes@...essinduktion.org> wrote:
> On Fri, Jan 24, 2014 at 10:36:54AM +0100, Emmanuel Thierry wrote:
>> Hello,
>>
>> Le 23 janv. 2014 à 08:15, Sharat Masetty a écrit :
>>
>> > Unfortunately toggling this config setting CONFIG_IPV6_ROUTER_PREF did
>> > not help, I see the same problem in both cases.
>> > The kernel version I am using is 3.10.0.
>> >
>> > Thanks for confirming that this is a non issue on 3.13 kernel version.
>> > Would you happen to know which patch would have potentially fixed this
>> > issue?
>>
>> Your problem looks like the following one :
>> http://marc.info/?l=linux-netdev&m=137280268407054&w=2
>>
>> Which has been fixed in 3.10.4, and 3.11+
>
> Yes, that could very well be the case. We resolve the gateway while
> inserting the route (if not on-link), and it may not be available
> because of missing probes or no traffic went to it, yet. Thanks for
> looking after this, Emmanuel.
>
> I really recommend using the stable kernels btw. instead of the vanialla
> point zero releases.
>
> Thanks,
>
>   Hannes
>
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