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Re: cat3550 vlan taggin question: ipexpert lab manual [7:84937] posted 02/27/2004
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Am I right in thinking it is only dot1q trunk interfaces that will accept
non-tagged frames (and not isl)?

Tim
""Charles D Hammonds""  wrote in message
news:200402260743.i1Q7hbMg029742@xxxxxxxxxxxxxxxxx
> correct, frames are only tagged when they traverse a trunk link. in order
> for vlan 2 to carry non-tagged frames across a trunk, you would have to
> change the native vlan to vlan2.
>
> Charles
>
> ----- Original Message ----- 
> From: "John Matus"
> To:
> Sent: Wednesday, February 25, 2004 11:39 PM
> Subject: Re: cat3550 vlan taggin question: ipexpert lab manual [7:84937]
>
>
> > ok, fair enough....i had a feeling that this was 'default'
behavior,...but
> > don't vlans carry tags only when they traverse trunked links?  if this
is
> > so, could, say - vlan 2 'not carry tagged frames'...
> > but then again, in order for a vlan to carry anything i would imagine
that
> > it must be on a trunk, right?
> >
> > -- 
> >
> > Regards,
> >
> > John D. Matus
> > MCSE, CCNP
> > 818.782.2061 office
> > 818.430.8372 mobile
> > jmatus@xxxxxxxxxxx
> >
> >
> > ""John Matus""  wrote in message
> > news:200402260714.i1Q7Ej2L025941@xxxxxxxxxxxxxxxxx
> > > hi there,
> > > there is a task that comes up repeatedly in this manual for the
> > > catalyst3550's.  the task states:
> > >
> > > configure layer 2 etherchannel group on fa0/23 and 0/24 of both
> switches.
> > > use ieee standard trunking protocol and make sure ONLY VLAN 1 can
carry
> > non
> > > tagged frames.
> > >
> > > i can configure the etherchannel just fine and use dot1q for the
> protocol,
> > > but i have no idea what "make sure  ONLY vlan 1 can carry non tagged
> > frames"
> > > means.  the channel group is a trunk so i would think expect it to
carry
> > > tagged frames....so would this mean to remove/prune vlan 1 from this
> > trunk?
> > > or is it something different?
> > >
> > > thanks in advance for you help!
> > > john d. matus
> > >
> > >
> > > -- 
> > >
> > > Regards,
> > >
> > > John D. Matus
> > > MCSE, CCNP
> > > 818.782.2061 office
> > > 818.430.8372 mobile
> > > jmatus@xxxxxxxxxxx
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