RE: Does Disabling DTP means adding nonegotiate too?

In order to disable DTP on a trunk link- you need the following configuration for the 3560:

switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate

The switchport mode trunk command sets the DTP mode to ON, and the nonegotiate command stops the sending of DTP messages.

If you were to just perform switchport mode trunk (after setting the encapsulation), you are set to unconditionally trunk on this end, but you are also sending DTP frames in an attempt to get the other side of the link to trunk.

Proper confirmation is done with the show interface switchport command.

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of gokul krishna
Sent: Wednesday, August 25, 2010 7:32 PM
To: ccielab_at_groupstudy.com
Subject: Does Disabling DTP means adding nonegotiate too?

When We are asked to disable dynamic desirable mode on trunks:

Intial status:
This is under dynamic desirable mode
Fa0/13 desirable 802.1q trunking 146

I configured this:
This is under mode trunk
Fa0/13 on 802.1q trunking 146
This is when we do mode trunk + no negotiate
Fa0/13 on 802.1q trunking 146
But do i need to do this? If so why? does disabling dynamic desirable means
to disable negotiating too? can some one inter relate?

Thanks in advance!
Kris

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Received on Wed Aug 25 2010 - 20:37:09 ART