[cisco-voip] 3750 switch, DISABLES port when ipphone gets unplugged

[Anthony Kouloglou]

Anthony,
i found out that due to loopback detected (!!!) the errdisable function
disables the port (the default timer is 5minutes to bring it up again!!). I
set it to the minimum (30secs) and at leeat it is working pretty quickly.
 The question is why does the switch considers that there is  a loopback,
when the ipphone is suddently unplugged from the power (the error log says
"collisions exceeded threshold".
    Keep in mind that with 7960 there is no problem!! Only with 7905 or 7902
it is happening!!

Cheers,
Anthony

----- Original Message ----- 
From: "Anthony Mendoza" <amendoza at Niku.com>
To: "Anthony Kouloglou" <akoul at dataways.gr>
Sent: Τρίτη, 22 Μαρτίου 2005 9:30 πμ
Subject: Re: [cisco-voip] 3750 switch, DISABLES port when ipphone gets
unplugged


> Sounds like port security may be turned on in some fashion.  Does the
> switch report any errors?  If you have Cisco Support, now is the time to
> bring in TAC if you need to get it resolved quickly.
> -- 
> Anthony Mendoza
>
> Anthony Kouloglou wrote this message, dated 3/21/2005 11:21 PM:
> > Hi all,
> >     i have i very serious problem in one of fresh ip telephony
> > implementations: when i reset the phone everything seems to work fine.
> > But when the phone gets unplugged (the power cord) the port of the
> > switch on which the phone is attached goes down and only through command
> > line the problem is fixed (i give a "no shut" command in the interface).
> > I cannot fix the problem through the CMS, since when i give enable the
> > port does not get enabled!!
> >     I have tried to change the IOS but the same thing happened so i
> > guess it is something else.
> > DOES anyone has a clue of what is going on? The customer is going crazy
> > with that cisco bizzare thing!! He wants to replace them with 3COM
> > switches and i don't know what to tell him!!
> >
> > P.S. The same thing with port disabling is happening when an attached
> > laptop for example goes in suspend mode!! When you logged back, the port
> > is disabled!!
> >
> > Thanks,
> > Anthony
> >
> >
> > ------------------------------------------------------------------------
> >
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> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
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