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List:       openbsd-misc
Subject:    Re: Interface input errors incrementing
From:       Stuart Henderson <stu () spacehopper ! org>
Date:       2013-09-25 20:25:51
Message-ID: slrnl46hmo.t78.stu () naiad ! spacehopper ! org
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On 2013-09-25, Darren Spruell <phatbuckett@gmail.com> wrote:
> On Tue, Sep 24, 2013 at 5:18 AM, Stuart Henderson <stu@spacehopper.org> wrote:
>> On 2013-09-24, Darren Spruell <phatbuckett@gmail.com> wrote:
>>> On Fri, Sep 20, 2013 at 12:13 PM, Alexey E. Suslikov
>>><alexey.suslikov@gmail.com> wrote:
>>>>> Any idea what the issue could be?
>>>>
>>>> could you provide netstat -s output after "several hours"?
>>>
>>> To circle back, errors started building again and below is netstat -s.
>>> As Chris suggested I'll try a snapshot and see if issue surfaces
>>> again.
>>
>> Are you certain your cabling and switch are OK?
>
> No. I've got to swap them out to see but wanted to first check out the
> firewall due to fact that rebooting it clears the issue for a few
> days.
>
>> What do you mean by "ethernet tap"?
>
> One of these units:
>
> http://auctionimages.s3.amazonaws.com/1936/20572/14577108.jpg
>
> It sends a copy of network traffic from link between firewall and LAN
> switch to an IDS sensor. I'll also need to verify it along with the
> switch (it's a layer 1 device and passes through link negotiation but
> could still introduce errors I believe).
>
>
> +-------------+    +----------+    +-----+    +--------+
>| cable modem |----| firewall |----| tap |----| switch |
> +-------------+    +----------+    +-----+    +--------+
>                                      | |
>                                      | |
>                                      | |  +--------+
>                                      |  \.|        |
>                                       \___| sensor |
>                                           |        |
>                                           +--------+
>
>

I thought so, but then I noticed you were using autoneg and I was
under the (possibly mistaken) impression that these didn't work properly
with autoneg. (though I'm also a bit unsure whether sis works properly
*without* autoneg as I seem to remember some problem in that area ;)

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