From: Ronnie Angello (ronnie.angello@gmail.com)
Date: Mon Apr 02 2007 - 09:05:04 ART
The switch supports tunneling of CDP, STP, including multiple STP (MSTP),
and VTP. Protocol tunneling is disabled by default but can be enabled for
the individual protocols on IEEE 802.1Q tunnel ports or on access ports.
Tunneling is not supported on trunk ports. If you enter the
*l2protocol-tunnel
*interface configuration command on a trunk port, the command is accepted,
but Layer 2 tunneling does not take affect unless you change the port to a
tunnel port or an access port.
Ronnie
On 4/2/07, dampened <cheechew@hotmail.com> wrote:
>
> Dear Josef,
>
> Which part of the document states it cannot work with dot1q?
>
> It would be strange if the interconnect switch is unable to support dot1q.
>
> Regards
>
>
>
>
>
>
>
> "Josef A" <josefnet@gmail.com>
> Sent by: nobody@groupstudy.com
> 03/28/2007 06:43 PM Please respond to
> "Josef A" josefnet@gmail.com
>
>
>
>
> Layer 2 protocol tunnelling only works with access ports or tunnel ports.
>
>
>
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12225see/scg/swtu
> nnel.htm
>
>
>
> On 3/27/07, Swan, Jay <jswan@sugf.com> wrote:
> >
> > I have the following physical topology:
> >
> >
> >
> > R3---SwA---SwB---R5
> >
> >
> >
> > R3 and R5 are in access vlan 35 with "l2protocol-tunnel cdp" on the
> > access ports.
> >
> >
> >
> > If I configure the link between SwA and SwB in access vlan 35 with
> > "l2protocol-tunnel cdp", everything works fine: R3 and R5 see each other
> > as directly connected CDP neighbors. If I configure the link between SwA
> > and SwB as a hard-coded 802.1q trunk, however, the link is err-disabled
> > with an l2ptguard error.
> >
> >
> >
> > I don't understand why this doesn't work with a trunk link. Thoughts?
> >
> >
> >
> > Jay
> >
> > _______________________________________________________________________
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