Re: nd6_na_input: duplicate IP6 address

[Andy Ruhl <acruhl%gmail.com@localhost>]

On Fri, May 10, 2019 at 3:34 PM Mike Pumford <mpumford%mudcovered.org.uk@localhost> wrote:
> What's puzzling is that up until my last os update I never saw any of
> these messages. Has the kernel print only just been added? If its always
> been there something in the OS has to have changed to trigger them on
> this host as the network environment has not changed at all. The rate at
> which they are produced is swamping everything else in the kernel
> message buffer.
>
> I've also now updated another system and its now showing exactly the
> same symptoms with exactly the same config.
>
> Is there anything I can do to debug this further?

I think what's being said is something like: This could be a timing
difference between your current kernel and the previous one where a
packet originating from your machine can get looped around and then
trigger the duplicate address detection. Apparently the (network?)
hardware shouldn't do this but it does.

Roy said he's adding code so the machine can detect this condition and
ignore it.

There doesn't seem to be much to do if I'm understanding this right,
unless you want to find out why your hardware is doing this.

Andy