From: Adam Jacob Muller <netdev@adam.gs>
To: netdev@vger.kernel.org
Subject: r8169 and flapping links
Date: Wed, 13 Mar 2013 02:05:34 -0400 [thread overview]
Message-ID: <5140172E.1030605@adam.gs> (raw)
Hi,
I have a pair of RTL8168B-based network cards with SFP's installed in
them (http://www.startech.com/~PEX1000SFP)
They have some extremely unusual behavior that I'm curious if anyone on
the list has ever seen or could shed some light on.
Sometimes after bringing the network card up the network driver will
continuously flap like:
r8169 0000:01:00.0 eth2: link down
r8169 0000:01:00.0 eth2: link up
r8169 0000:01:00.0 eth2: link down
r8169 0000:01:00.0 eth2: link up
The link is obviously not usable in that state.
On occasion though, some combination of down/up'ing the interface will
actually bring things into a stable state and everything works well.
Interestingly, the hardware link light does not fluctuate while this
happens.
I've tried with the kernel-based r8169 driver, and the r8168 driver from
the Realtek site, but both exhibit the same behavior.
I do see a number of "similar" reports online regarding this issue, has
anyone here seen anything like this before? Neither raising the module
debug level to 16 and raising msglvl with ethool produced nothing
interesting. Any suggestions on where to look for more debug (or a
better list to ask, if this isn't the right place) would be much
appreciated.
Thanks!
-Adam
reply other threads:[~2013-03-13 6:15 UTC|newest]
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