Hi,
IPv6 autoconfig has been broken on dunkel since about 1550Z. Impact
is that if you're on dunkel and rely on autoconfig for IPv6 then
your IPv6 will have stopped working.
This appears to be due to radvd going into a tight CPU loop, as it
does fairly regularly. It does not appear to be a very high quality
piece of software, but without any alternative implementation.
I added some monitoring to check when radvd reaches >90% CPU, but it
seems I misunderstood how to use Nagios's check_procs plugin for CPU
monitoring, so it didn't fire.
At around 1615Z a customer notified me that their IPv6 wasn't
working, and I've been investigating since then. I've since
replaced the monitoring of that with one that works.
If I kill it and restart it then it will almost certainly start
working again, but I want to keep it broken to investigate it and
properly test some workarounds.
I do recommend that everyone using IPv6 on their VPS does statically
configure it.
Cheers,
Andy
--
http://bitfolk.com/ -- No-nonsense VPS hosting