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Subject: Re: Ue0/ue1 flapping
To: Kristof Provost <kp@FreeBSD.org>
References: <55D6217B.8000805@denninger.net> <55D636FE.9020005@xs4all.nl>
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Cc: freebsd-embedded@freebsd.org,
 "techniek@lijst.wirelessleiden.nl" <techniek@lijst.wirelessleiden.nl>
From: Huub Schuurmans <huubsch@xs4all.nl>
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Date: Sun, 11 Oct 2015 11:11:39 +0200
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Op 08/10/15 om 18:51 schreef Kristof Provost:
> 
>> On 08 Oct 2015, at 11:41, Huub Schuurmans <huubsch@xs4all.nl> wrote:
>> We have now finally found that in our case a running pf is causing
>> problems with the usb-lan adapters, even if all rules are flushed (!).
>> Problem doesnot occur with ipfw. We have not tested flapping yet.
>>
> It’s possible that this is another case of 
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198868
> 
> I’m working on a checksum/TSO problem that I think is related to this.
> Could you give the attached patch a try?
> If I’m right about the cause this should fix things for you.
> 
>

Yes, if I patch pf (on 10.2-RELEASE) one usb-lan adapter works also with
pf running. However if I install two adapter NONE of them works, so
obviously I can not check the stability for two adapters.
But this is definitely I significant improvement!
Thanks for the patch.

Huub