RE: dot1q and ISL trunks intermixing

From: Faryar Zabihi \(fzabihi\) (fzabihi@cisco.com)
Date: Mon Jul 03 2006 - 10:39:55 ART


Not in front of my laptop and I think I have diff configs on my rack. But the
vlan is created on both switches and allowed on the trunk. Trunk is
forwarding. I'll lab this up again and see what I run into.

 -----Original Message-----
From: David Timmons [mailto:masterdt@yahoo.com]
Sent: Mon Jul 03 09:23:26 2006
To: Victor Cappuccio; Faryar Zabihi (fzabihi)
Cc: 'Cisco certification'
Subject: RE: dot1q and ISL trunks intermixing

Hi,

You should not have any issues with mixing ISL and
Dot1q on Cisco's hardware. You should need to make
sure that both ends of the trunk are setup in the same
fashion. I think you should double check your
spanning-tree status and trunk status. Can you post
the status of the spanning-tree and trunks for the
respective interfaces and vlans? I would say the the
mostly likely reason for the issues is that the vlan
was not created on the problematic switch.

dt

--- Victor Cappuccio <cvictor@protokolgroup.com>
wrote:

> Is ip routing enabled on the switches?
> Are the interface in the same vlan when doing the
> test?
> Are the Vlan allowed in the trunk?
>
>
>
> -----Mensaje original-----
> De: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] En nombre de Faryar
> Zabihi (fzabihi)
> Enviado el: Domingo, 02 de Julio de 2006 11:36 p.m.
> Para: Feras Abunamous (fabunamo); Cisco
> certification
> Asunto: RE: dot1q and ISL trunks intermixing
>
> I have had issues if I ping from routers in
> different switch than the other
> router. Trunk between the switches is used in this
> case.
>
> -----Original Message-----
> From: Feras Abunamous (fabunamo)
> Sent: Sun Jul 02 23:20:11 2006
> To: Cisco certification
> Subject: dot1q and ISL trunks intermixing
>
> I have isl trunk between two switches and I have a
> router's fastethernet
> interface split into sub interfaces and it is
> connected to one of
> switches over a dot1q trunk. Would this work? And
> is there any
> limitations on intermixing isl's and dot1q?
>
>



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