Re: Significance of Native Vlan

I think if ST is enabled and native vlan mismatch is detected then it will
put the port in inconsistant mode (please double check).

On Sat, Nov 21, 2009 at 6:40 PM, Rick Darsey <rdarsey_at_gmail.com> wrote:

> I am new here, so if this makes no sense, please excuse it.
>
> I am not clear on the correlation between ST and native VLAN in your
> question. Is the Spanning Tree, or DTP?
>
> Rick
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of S
> Malik
> Sent: Saturday, November 21, 2009 5:09 PM
> To: Babatunde Sanda
> Cc: Cisco certification
> Subject: Re: Significance of Native Vlan
>
> Sanda ,
> Thanks for the response. In fact I just wanted to know the significance of
> native vlan when "sw mode trunk" and "sw trunk allowed vlan" is configured
> and one end has ST disabled on the trunk interface. One end is Cisco and
> other end Dell.
>
> I can see trunk forwarding the traffic while interface is in trunking mode
> and native vlans on two ends are different.
>
>
>
> On Sat, Nov 21, 2009 at 10:55 AM, Babatunde Sanda
> <sbabatunde1_at_ca.rr.com>wrote:
>
> > Native vlan is used to carry untagged packets. When you create a vlan the
> > number of the vlan becomes the tag and it travels with the packets from
> > switch to switch. By default on most vendor switches vlan 1 is the
> native
> > vlan. You can make the native vlan anything you want but you must have
> > this
> > configuration "SWITCHPORT TRUNK NATIVE VLAN (VLAN NUMBER)" on your trunk
> > ports for untagged packets to be carried.
> >
> > Spanning tree umm! That will require some reading on your part but simply
> > put spanning tree is a layer two technology used to prevent loops around
> > the
> > network. There are different types /modes. Depending on the type of
> > spanning tree you have implemented that will determine if you have a
> > "blocked port" or "alternate port" status. Either ways you can still
> > disable spanning tree on a port (caveat this might prevent loops from
> being
> > detected on your network). "spanning portfast" can do this on an access
> > port. You can also disable it on a trunkport with the spanning tree
> point
> > to point configuration.
> >
> >
> > Spanning tree implementation requires planning on your part and knowing
> > your
> > network topology well.
> >
> >
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> S
> > Malik
> > Sent: Saturday, November 21, 2009 6:46 AM
> > To: Cisco certification
> > Subject: Significance of Native Vlan
> >
> > All,
> > If two switches configured for "switchport mode trunk" & " sw trunk encap
> > dot1q" and spanning is disabled on one end of the trunk, then what is
> the
> > significance of Native Vlan?
> >
> >
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> >
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Received on Sat Nov 21 2009 - 19:36:47 ART