Re: Switchport trunk allow ?

Hi Paul,

Thanks for the information.

If we cannot prevent vlan 1 but we change the native vlan to vlan 50 for
example, must i explicitly allow the native vlan 50 with the command
switchport allow vlan 50, ..... etc? Thanks.

Regards
Vincent Tay

On Sun, Oct 24, 2010 at 11:18 AM, Paul Negron <negron.paul_at_gmail.com> wrote:

> I may be wrong but I thought you could not prevent Vlan 1. It has been a
> long time since I messed with the switches though.
>
> Paul
> --
> Paul Negron
> CCIE# 14856 CCSI# 22752
> Senior Technical Instructor
> www.micronicstraining.com
>
>
>
> > From: Dale Shaw <dale.shaw_at_gmail.com>
> > Reply-To: Dale Shaw <dale.shaw_at_gmail.com>
> > Date: Sun, 24 Oct 2010 14:05:46 +1100
> > To: Vincent Tay <vtay.75_at_gmail.com>
> > Cc: "Ccielab_at_groupstudy.com" <ccielab_at_groupstudy.com>
> > Subject: Re: Switchport trunk allow ?
> >
> > Hi Vincent,
> >
> > On Sun, Oct 24, 2010 at 1:55 PM, Vincent Tay <vtay.75_at_gmail.com> wrote:
> >>
> >> If i use the command switchport trunk allow, do i have to include the
> native
> >> vlan "switchport trunk allow vlan1,.... if vlan 1 is a native vlan in
> order
> >> to bring the trunk up?
> >
> > Not in my experience, no -- the native VLAN does not need to be
> > explicitly included in the list of VLAN IDs specified with "switchport
> > trunk allowed vlan" command.
> >
> > From the command reference:
> >
> > "allowed vlan *vlan-list* // Set the list of allowed VLANs that can
> > receive and send traffic on this interface in tagged format when in
> > trunking mode"
> >
> > The keyword there being *tagged*.
> >
> > VLAN 1 is a special case but I'll leave it up to you to figure that one
> out
> > :-)
> >
> > cheers,
> > Dale
> >
> >
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Received on Sun Oct 24 2010 - 22:22:09 ART