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Date:      Thu, 20 Aug 2015 13:50:35 -0500
From:      Karl Denninger <karl@denninger.net>
To:        freebsd-embedded@freebsd.org
Subject:   Ue0/ue1 flapping
Message-ID:  <55D6217B.8000805@denninger.net>
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[-- Attachment #1 --]
Raspberry Pi, FreeBSD 11.0-CURRENT #0 r285923: Mon Jul 27 22:55:03 CDT 2015

Two interfaces, the on-board and a Lenovo dongle (as ue1); both are
flapping at an irregular rate.

ue0: link state changed to DOWN
ue0.3: link state changed to DOWN
ue0: link state changed to UP
ue0.3: link state changed to UP
ue1: link state changed to DOWN
ue1: link state changed to UP
ue0: link state changed to DOWN
ue0.3: link state changed to DOWN
ue0: link state changed to UP
ue0.3: link state changed to UP

I have a vlan defined on ue0, but ue1 has only one network on it.  I've
tried pinning the media type at the switch it is plugged into thinking
perhaps it's fighting with the switch it's connected to, but that's not
it -- it makes no difference.

Nor does it appear to be traffic related.

The flapping hoses the snmp daemon that is running on the machine,
causing it to "go deaf."  Interestingly enough it doesn't interrupt a
ssh session that you may have open if/when it happens.

Any ideas on how I can figure out why (e.g. what condition the interface
code is seeing?) the interfaces are resetting?  This is all I have in
the dmesg.

-- 
Karl Denninger
karl@denninger.net <mailto:karl@denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/

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