From: Chuck Church (cchurch@xxxxxxxxxxxx)
Date: Fri Nov 23 2001 - 10:53:54 GMT-3
Sorry I'm late on this, just catching up. Anyway, be careful with this kind
of error if you've got any non-Cisco layer 2 equipment. Only Cisco
terminates CDP frames on layer 2. Everyone else passes them on. So if you
had:
CAT4000---100mbfull---3ComLayer2switch---10mbhalf----Cisco2610
You'd get a CDP duplex mismatch, because the 3Com forwards them on. This
will happen whether you're set to auto or not. The only way to fix it is to
disable CDP on one side, or maybe change to CDP version 1 on one side, which
I don't think carries duplex information.
Chuck
-----Original Message-----
From: nobody@groupstudy.com
To: Aaron T. Hassan; Juan Villamil; ccielab@groupstudy.com
Sent: 11/20/01 8:32 PM
Subject: RE: duplex error
Beaware, some fastethernet card does not allow to change the setting but
other allow.
SO try it out your self. Since in most case, it is connected to a
switch, you need
to verify at both side.
Parry Chua
-----Original Message-----
From: Aaron T. Hassan [mailto:tyang@attcanada.ca]
Sent: Wednesday, November 21, 2001 4:38 AM
To: Juan Villamil; ccielab@groupstudy.com
Subject: Re: duplex error
There is a very good Cisco document on half full duplex and 10/100
configuration. You either leave both ends auto-negotiation or manually
config each end. Better we can have your config for the interfaces.
----- Original Message -----
From: "Juan Villamil" <juan.villamil@earthling.net>
To: <ccielab@groupstudy.com>
Sent: Tuesday, November 20, 2001 3:26 PM
Subject: duplex error
> Hi Group
>
> Any ideas why I get this error when everything seems properly
configure:
>
>
> 03:38:58: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on
> FastEthernet0/0
> (not full duplex), with JAE0502029T(cat) 2/2 (full duplex).
>
>
> Any help would be greatly appreciated.
> Juan
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