From: James Matrisciano (jmatrisciano@kenttech.com)
Date: Wed Aug 10 2005 - 07:19:09 GMT-3
As well, thanks...
It was very confusing to me when I had set all my ports to switch mode
access and did the sh dtp only to see that all 24 interfaces were using
dtp! I thought that there was something truly not working right. Then
I found the debug dtp all command :). If you have any questions about
it, run the command (after setting all ports to either switchport mode
access or nonegotiate on the trunks. This will show that nothing as far
as dtp is running on the access ports and that the trunks que dtp
packets, but nonegotiate is enabled-discarding (dropping the dtp).
Works like a charm!
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
amir cohen
Sent: Wednesday, August 10, 2005 6:11 AM
To: Shanky; Scott Thornton
Cc: Brian McGahan; Jerry Mears (jmears); amir cohen;
ccielab@groupstudy.com
Subject: Re: Disabling Negotiation 3550 question?
Guys,
Thanx for the help:-)
Amir
--- Shanky <shankyz@gmail.com> wrote:
> Hi,
> VTP can be disabled globally for the complete switch ..using vtp mode
> transparent but DTP cant (CMIIW).
> For disabling DTP , you got 2 options 1. For Access Links --
> Switchport mode access 2. For Trunk Links -- Switchport nonegotiate
> you can check the status of DTP gloablly ...
> Rack01SW1(config)#do show dtp
> Global DTP information
> Sending DTP Hello packets every 30 seconds Dynamic Trunk timeout is
> 300 seconds
> 6 interfaces using DTP
> or
> on interface basis
> DTP information for FastEthernet0/23:
> *TOS/TAS/TNS: TRUNK/ON/TRUNK*
> TOT/TAT/TNT: *ISL/ISL/ISL*
> Neighbor address 1: 000D2882E217
> Neighbor address 2: 000000000000
> Hello timer expiration (sec/state): 12/RUNNING Access timer expiration
> (sec/state): never/STOPPED Negotiation timer expiration (sec/state):
> never/STOPPED
> Multidrop timer expiration (sec/state):
> never/STOPPED
> FSM state: S6:TRUNK
> # times multi & trunk 0
> *Enabled: yes*
> In STP: no
> Hope it helps
> Shanky
> On 8/10/05, Scott Thornton <scthornton@gmail.com>
> wrote:
> >
> > You can see how to do this in this doc from Cisco.
> Start near the
> > bottom of page 12 or search for disable DTP.
> >
> >
> >
>
http://www.cisco.com/application/pdf/en/us/guest/netsol/ns376/c649/cdcco
nt_0900aecd800ebd1e.pdf
> >
> > On 8/9/05, Brian McGahan
> <bmcgahan@internetworkexpert.com> wrote:
> > > Setting the interface mode to static access
> automatically disables DTP
> > > negotiation. You can see this via the "show
> interface switchport"
> > > output. For trunk links that you don't want to
> run DTP on you must
> > > issue the "switchport mode trunk", "switchport
> trunk encapsulation"
> > > (since it can't be negotiated via DTP), and the
> "switchport nonegotiate"
> > > commands.
> > >
> > > HTH,
> > >
> > > Brian McGahan, CCIE #8593
> > > bmcgahan@internetworkexpert.com
> > >
> > > Internetwork Expert, Inc.
> > > http://www.InternetworkExpert.com
> > > Toll Free: 877-224-8987 x 705
> > > Outside US: 775-826-4344 x 705
> > > 24/7 Support:
> http://forum.internetworkexpert.com
> > > Live Chat:
> http://www.internetworkexpert.com/chat/
> > >
> > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On Behalf
> > > Of
> > > > Jerry Mears (jmears)
> > > > Sent: Tuesday, August 09, 2005 1:52 PM
> > > > To: Scott Thornton; amir cohen
> > > > Cc: ccielab@groupstudy.com
> > > > Subject: RE: Disabling Negotiation 3550
> question?
> > > >
> > > > I believe to disable DTP you need to issue the
> int command:
> > > >
> > > > switchport nonegotiate
> > > >
> > > > This will disable DTP negotiations out the
> interface.
> > > >
> > > >
> > > > Jerry Mears
> > > > Systems Engineer
> > > > Cisco Systems
> > > > 7900 International Drive suite 400 Bloomington, MN 55425
> > > > 952-967-8333 office
> > > > 952-967-8311 fax
> > > > 651-470-4412 cell
> > > > jmears@cisco.com
> > > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On Behalf
> > > Of
> > > > Scott Thornton
> > > > Sent: Tuesday, August 09, 2005 1:40 PM
> > > > To: amir cohen
> > > > Cc: ccielab@groupstudy.com
> > > > Subject: Re: Disabling Negotiation 3550
> question?
> > > >
> > > > In native ios, you disable DTP by issuing...
> > > >
> > > > switchport mode access
> > > >
> > > > in catos
> > > >
> > > > set trunk mod/port off
> > > >
> > > > HTH
> > > >
> > > > Scott
> > > >
> > > > On 8/9/05, amir cohen <avi_patish@yahoo.com>
> wrote:
> > > > > Guys,
> > > > >
> > > > > If i want to disable any AUTO-negoation for
> the DTP, VTP for all of
> > > > > the command for the entire switch What will
> be the Syntex?
> > > > >
> > > > > Thanx,
> > > > > Amir
> > > > >
> > > > >
> __________________________________________________
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> > > > >
> > >
>
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