Skip site navigation (1)Skip section navigation (2)
Date:      Wed, 29 Aug 2018 03:01:56 +0700
From:      Eugene Grosbein <eugen@grosbein.net>
To:        Dries Michiels <driesm.michiels@gmail.com>, "'Marek Zarychta'" <zarychtam@plan-b.pwste.edu.pl>, net@freebsd.org
Subject:   Re: IPv6 Martians
Message-ID:  <e0db3575-e3f3-2c2e-a2ae-5641285dfc23@grosbein.net>
In-Reply-To: <001b01d43f06$40508740$c0f195c0$@gmail.com>
References:  <5adfc4d1-94d5-da7f-7d98-8dd91ff95b33@plan-b.pwste.edu.pl> <001b01d43f06$40508740$c0f195c0$@gmail.com>

next in thread | previous in thread | raw e-mail | index | archive | help
29.08.2018 2:35, Dries Michiels wrote:

>> IPv6 Martians are blocked by forwarding code in 11-STABLE, but all this noise
>> fills kernel message buffer:
>>
>> cannot forward from :: to 2001:xyz:zxy::f00b nxt 58 received on vlan5 cannot
>> forward from :: to 2001:xyz:zxy::f00b nxt 58 received on vlan5 cannot
>> forward from :: to 2001:xyz:zxy::f00b nxt 58 received on vlan5 cannot
>> forward src fe80:10::yxz:a50f:fcb6:5f1e, dst 2001:xyz:zxy::f00b, nxt 58, rcvif
>> vlan4, outif vlan2 cannot forward src fe80:10::yxz:a50f:fcb6:5f1e, dst
>> 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif vlan2 cannot forward src
>> fe80:10::yxz:a50f:fc89:e1a0, dst 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif
>> vlan2 cannot forward src fe80:10::yxz:a50f:fc89:e1a0, dst
>> 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif vlan2 cannot forward src
>> fe80:10::268a:7ff:feeb:d250, dst 2001:xyz:zxy::d1, nxt 17, rcvif vlan4, outif
>> vlan2 cannot forward src fe80:10::yxz:a50f:fc8a:9024, dst
>> 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif vlan2 cannot forward src
>> fe80:10::yxz:a50f:fc8a:9024, dst 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif
>> vlan2 cannot forward src fe80:10::1, dst 2001:xyz:zxy::f00b, nxt 58, rcvif
>> vlan4, outif vlan4 cannot forward src fe80:10::1, dst 2001:xyz:zxy::f00b, nxt
>> 58, rcvif vlan4, outif vlan4 cannot forward src fe80:10::250:56ff:fe86:1b36,
>> dst 2001:xyz:zxy::d1, nxt 17, rcvif vlan4, outif vlan2 cannot forward src
>> fe80:10::yxz:a50f:fc90:9d4, dst 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif
>> vlan2 cannot forward src fe80:10::yxz:a50f:fc90:9d4, dst 2001:xyz:zxy::f00b,
>> nxt 58, rcvif vlan4, outif vlan2 cannot forward src
>> fe80:10::yxz:a50f:fc89:e1a0, dst 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif
>> vlan2 cannot forward src fe80:10::yxz:a50f:fc89:e1a0, dst
>> 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif vlan2 cannot forward src
>> fe80:10::yxz:a50f:fc89:e1a0, dst 2001:xyz:zxy::f00b, nxt 58, rcvif vlan4, outif
>> vlan2
>>
>> Dear subscribes, could you please prompt how to get rid of this noise?
>> So far I have not found appropriate sysctl for disabling this messages.
> 
> I can confirm the same issue on stable-11. 
> I just ignored it as I thought it was a badly coded client.
> Seems there is something else going on then.

As workaround, use sysctl net.inet6.ip6.log_interval=2147483647
This means "log this once per 68 years".





Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?e0db3575-e3f3-2c2e-a2ae-5641285dfc23>