From: Gregory Gombas (ggombas@gmail.com)
Date: Wed Oct 31 2007 - 08:24:33 ART
Correct, which is why I am confused that they configured dot1q-tunnel
on a port connected to a router that is not running dot1q trunking?
As for the trunk encapsulation - you're saying dot1q-tunnel will work
with an ISL trunk?!? You mean only at the core, right?
"When configuring IEEE 802.1Q tunneling on an edge switch, you must
use IEEE 802.1Q trunk ports for sending packets into the
service-provider network. However, packets going through the core of
the service-provider network can be carried through IEEE 802.1Q
trunks, ISL trunks, or nontrunking links."
On 10/31/07, shiran guez <shiranp3@gmail.com> wrote:
> hi
>
> http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12240se/scg/swtunnel.htm#wp1005050
>
> If protocol tunneling is not enabled on IEEE 802.1Q tunneling ports, remote
> switches at the receiving end of the service-provider network do not receive
> the PDUs and cannot properly run STP, CDP, and VTP.
>
>
> If IEEE 802.1Q tunneling is not used, you can still enable Layer 2 protocol
> tunneling by connecting to the customer switch through access ports and by
> enabling tunneling on the service-provider access port.
>
>
> So basically what it is saying is that if you want to tunnel 2 access port
> it will be ok to you the l2tunnel, but if you want to tunnel a trunk you
> need to have the dot1q-tunnel mode.
>
> side note: it do not meter if you run the trunk as ISL or dot1q inside the
> dot1q-tunnel.
>
>
>
> On 10/31/07, Gregory Gombas <ggombas@gmail.com> wrote:
> >
> > Can someone kindly explain why the solution guide has the interfaces
> > configured as switchport mode dot1q-tunnel in addition to
> > l2protocol-tunnel? Since the routers connected to the switch
> > interfaces are not running 802.1q encapsulation, why is the
> > dot1q-tunnel command needed?
> >
> > Wouldn't this task work equally well with just l2protocol-tunnel
> configured?
> >
> > Thanks,
> > Greg
> >
> >
> _______________________________________________________________________
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>
>
>
> --
> Shiran Guez
> MCSE CCNP NCE1
> http://cciep3.blogspot.com
> http://www.linkedin.com/in/cciep3
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