From: Anthony Sequeira (terry.francona@gmail.com)
Date: Thu Jan 19 2006 - 01:06:30 GMT-3
You will find many threads on this in the archives - but here is the
short answer -
You need to set the interfaces to either trunk mode or access mode -
AND THEN - you need to use the switchport nonegotiate command. For
some reason - everyone seemed to forget that here in this thread!
Here is a DOC-CD snippet -
switchport nonegotiate - Prevents the interface from generating DTP
frames. You can use this command only when the interface switchport
mode is access or trunk. You must manually configure the neighboring
interface as a trunk interface to establish a trunk link.
On 1/18/06, Gary Ring <garyring.work@gmail.com> wrote:
> Man you guys are fast. :-)
>
> Gary Ring
>
> On 1/18/06, Gary Ring <garyring.work@gmail.com> wrote:
> >
> > T.J.
> >
> > First you have to answer the question, "What is DTP and what is it used
> > for?"
> >
> > The Cisco answer: Dynamic Trunking Protocol (DTP) for negotiating
> > trunking on a link between two devices and for negotiating the type of
> > trunking encapsulation (802.1Q or ISL) to be used
> >
> > That being said. You must specify the type of encapsulation you want to
> > use on the trunk link (dot1q or isl). Then, you must issue the command
> > switchport mode trunk. This sets the port to a trunk unconditionally and
> it
> > will no longer use DTP frames to try to negotiate becoming a trunk nor will
> > it listen for DTP frames.
> >
> > Gary
> >
> > On 1/18/06, T.J. Mitchell <tj.mitchell@verizon.net> wrote:
> > >
> > > Guys -
> > >
> > > How would you disable DTP on the 3550 series switch?
> > >
> > >
> > >
> > > Thanks
> > >
> > >
> > >
> > > T.J. Mitchell
> > >
> > > _______________________________________________________________________
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>
> _______________________________________________________________________
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