Re: netbsd-9 ip6 kernel log messages

[Hauke Fath <hf%spg.tu-darmstadt.de@localhost>]

On 2019-08-30 03:22, Robert Elz wrote:

Thanks for the detailed analysis!

> Since you have v4 statically configured, I will guess that you're
> not starting dhcpcd

Correct.

> - if that's not running, the kernel is managing
> v6 autoconfig for you.
>
> Your initial message said "/var/log/messages gets spammed with..."
> from which I have been assuming not just one message, but many.

From dmesg(8):

[...]
[ 97324.649076] in6_setscope: can't set scope for not loopback interface 
vioif0 and loopback address ::1
[ 97324.649076] in6_setscope: can't set scope for not loopback interface 
vioif0 and loopback address ::1
[ 97326.651757] in6_setscope: can't set scope for not loopback interface 
vioif0 and loopback address ::1
[ 97326.651757] in6_setscope: can't set scope for not loopback interface 
vioif0 and loopback address ::1
[ 97330.657141] in6_setscope: can't set scope for not loopback interface 
vioif0 and loopback address ::1
[ 97330.657141] in6_setscope: can't set scope for not loopback interface 
vioif0 and loopback address ::1
[...]

Assuming the time is in seconds, the messages come in pairs, in 
consistent distances of 2, 4 and 4 seconds.

> Can you deduce from the timestamps the appoximate frequency, and
> perhape correlate that with the frequency of RA messages from whatever
> v6 enabled router is on the same (bridged, I am guessing from voif0)
> network link?

I tcpdump(8)ed ~1000 icmp6 packets, and there wasn't a single router 
advertisement; they were all "neighbor solicitation"s.

Cheerio,
hauke

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