IPv6 all over my syslog

iceblink iceblink at seti.nl
Wed Jan 21 12:59:56 UTC 2015


On 2015-01-20 16:12, Scott Blair wrote:
> I found this ALL over my syslog:
> Jan 20 10:06:09 Main kernel: [51901.601422] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:12 Main kernel: [51904.251299] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:15 Main kernel: [51906.879760] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:18 Main kernel: [51910.569600] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:21 Main kernel: [51913.146796] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:24 Main kernel: [51916.327981] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:27 Main kernel: [51919.060437] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:30 Main kernel: [51922.069394] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:33 Main kernel: [51925.582879] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:36 Main kernel: [51928.176361] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:39 Main kernel: [51931.012939] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:42 Main kernel: [51934.182566] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:45 Main kernel: [51937.436113] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> Jan 20 10:06:49 Main kernel: [51940.685033] IPv6: wlan0: IPv6 duplicate
> address 2601:3:3000:e17:226:82ff:fe3e:b46b detected!
> 
> WHat can I do to stop this constant reporting?
> 
> --
> 
> 
> Scott Blair
> 
> Save on backup time BackupDevice=null

According to this thread 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1120617 you can get 
rid of these messages by typing:
sudo sysctl net.ipv6.conf.wlan0.accept_dad=0

Best regards,
Patrick



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