Re: DTP - Interpreting the Question

Hi Roy,

I thought of that also, but disabling DTP wouldn't prevent SW2 from learning
which encap type it should use as well?

Rgrds,

Leonardo Hideki

On Thu, May 19, 2011 at 8:36 AM, Roy Khan <roykhan123_at_hotmail.com> wrote:

>
> Hi Guys
>
> Perfect solution Just I add one more command
>
> int fax/x
> > switchport trunk encap dot1q
> > switchport mode trunk
> *Switchport Nonegotiate *
> when you type show int trunk command on this switch you will see Mode is
> -On- it and Encapsulation means
> you statically configure the trunk.
> also use *show int Fax/x switchport* command to verify this.
> Remember 3560 default mode is switchport dynamic auto.
>
> Br
>
> Roy
>
>
> > Date: Thu, 19 May 2011 06:24:37 -0300
> > Subject: Re: DTP - Interpreting the Question
> > From: leohideki.ccie_at_gmail.come
> > To: mitsuie2_at_gmail.com
> > CC: ccielab_at_groupstudy.com
>
> >
> > Hi Sud,
> >
> > As SW1 should not negotiate, you should configure dot1q / trunk
> statically:
> >
> > !
> > int fax/x
> > switchport trunk encap dot1q
> > switchport mode trunk
> > !
> >
> > On SW2, it could be either desirable or auto, since SW1 is statically
> > configured to trunk.
> >
> > !
> > int fax/x
> > switchport mode dynamic [auto | desirable]
> > !
> >
> > In order to check this config, issue a "sh int trunk" on both sides. On
> > switch 1, it should come up with "802.1q" while on switch 2, it should
> come
> > up with "n-802.1q", "n" meaning that the trunking protocol was
> negotiated.
> >
> > HTH.
> >
> > Rgrds,
> >
> > Leonardo Hideki
> >
> > On Mon, May 16, 2011 at 4:28 AM, Sud Mu <mitsuie2_at_gmail.com> wrote:
> >
> > > Hi All,
> > >
> > > I've got a problem in interpreting this DTP question
> > >
> > > If there was a question where SW1 and SW2 are directly connected.
> > >
> > > Question:
> > > =======
> > > Link between SW1 and SW2 should be a 802.1q trunk. SW1's port should be
> > > configured statically to have 802.1q trunking. SW2 should negotiate
> 802.1q
> > > as trunking protocol to SW1. SW1 should not negotiate 802.1q to SW2.
> > >
> > > Where should I put "switchport mode dynamic desirable" ? on SW1 or SW2
> ?
> > >
> > > Although simple please give you experts idea
> > >
> > > Thanks,
> > > Sud
> > >
> > >
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Received on Thu May 19 2011 - 08:49:51 ART