From: John (jgarrison1@austin.rr.com)
Date: Sat Feb 09 2008 - 13:30:46 ARST
Just a guess but I would look to see if that port is connected to a
dot1q-tunnel with a l2 tunnel running through it.
----- Original Message -----
From: "nagendra kumar" <nagendranainar@yahoo.co.in>
To: <ccielab@groupstudy.com>
Sent: Saturday, February 09, 2008 5:22 AM
Subject: Error messages seen in switches
> Hi All,
>
> While doing my practice labs, I was facing the below 2 error message and
> the interface will be err-disabled.
>
> ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on <INTERFCAE>
>
> PM-4-ERR_DISABLE: l2ptguard error detected
>
> I googled the above messages and got directed to a cisco link which
> explains the first error message to be a condition due to balun cable
> incorrectly connected to ports and I didnt get any useful info about the
> second one
>
> Can some one please let me know if it is any config issue?. I was
> practicing Lab 20 in IEWB 4.1 Volume 2
>
> As a workaround, I disabled the error check and continued the lab.
>
> Regards,
> Nagendra
>
>
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