Network stack unstable after arp flapping

Steve Polyack korvus at comcast.net
Mon Apr 4 12:07:56 UTC 2011


On 4/3/2011 9:50 AM, Frederique Rijsdijk wrote:
> Steve,
>
> On 01-04-11 16:50, Steve Polyack wrote:
>> On 04/01/11 10:16, Frederique Rijsdijk wrote:
> [ .. ]
>>> Mar 31 18:36:12 srv01 kernel: arp: x.x.x.1 moved from
>>> 00:00:0c:9f:f0:3d to 00:00:0c:07:ac:3d on bge0
> [ .. ]
>>> The result of that, is that loads of FreeBSD machines (6.x, 7.x and
>>> 8.x) developed serious network issues, mainly being no or slow traffic
> [ .. ]
>>> Any ideas anyone?
>> We experienced a similar issue here, but IIRC only on our 8.x systems
>> (we don't have any 7.x).  Disabling flowtable cleared everything up
>> immediately.  You can try that and see if it helps.
> AFAIK this feature was introduced in 8.x? Btw you are here referring to
> UDP, we had issues with TCP. It could still be related, perhaps I'll get
> around emulating the situation and see if I can reproduce it.
>
>
Sorry, I tried to clarify that in the last piece of my post - the title 
on the PR is misleading and should be corrected.  We found out quickly 
after submitting it that all types of traffic (UDP, TCP, ICMP, etc.) are 
independently affected.


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