Loosing Ethernet Connectivity

Ted Mittelstaedt tedm at toybox.placo.com
Mon Jan 22 05:01:48 UTC 2007

Been there.  You need to replace your ethernet switch.  It's what
they call an ethernet hardware incompatability.

Forcing the card to 10baset half or 100 base t full might fix it but
probably not.

----- Original Message ----- 
From: "David Schulz" <mailinglists at tca-cable-connector.com>
To: <questions at freebsd.org>
Sent: Sunday, January 21, 2007 7:12 PM
Subject: Loosing Ethernet Connectivity

> Hello all,
> every once in a while i have a machine (6.1) that out of the blue,
> sometimes after days, some after 6 months, looses Ethernet
> Connectivity. My Machines just run some Service, and have no
> Keyboard / Mouse or Monitor. When the Machine goes down, eg, i am
> unable to ping it from another Machine on the Network, even
> restarting the machine using "reboot" will not fix the Problem. The
> only way to fix it is to login as root, and issue a "ifconfig vr0
> down && ifconfig vr0 up". Then a dmesg Message appears : "vr0: Using
> force reset command.", and after that i can successfully ping the
> machine again. I have had this Problem on different machines with
> different Network Cards, on different Ethernet Cables, and with
> FreeBSD Versions 5.5 until 6.1.
> Can anyone please help me to understand and possibly even fix this
> Problem?
> Thanks a lot,
> David
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