From: shiran guez (shiranp3@gmail.com)
Date: Wed Oct 31 2007 - 09:54:12 ART
SW2F0/20 and SW2F0/21 are trunk port they are connecting 2 SW and not SW to
Router.
Regarding my comment:
I mean that trunk between SW1 to SW4 can run ISL trough a dot1q-tunnel. like
it show bellow, I set it like so only for the example to be simple:
SW1 ---ISL ---SW2---DOT1Q-TUNNEL---SW3---ISL---SW4
On 10/31/07, Gregory Gombas <ggombas@gmail.com> wrote:
>
> 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
> > >
> > >
> > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> > >
> >
> >
> >
> > --
> > Shiran Guez
> > MCSE CCNP NCE1
> > http://cciep3.blogspot.com
> > http://www.linkedin.com/in/cciep3
>
-- Shiran Guez MCSE CCNP NCE1 http://cciep3.blogspot.com http://www.linkedin.com/in/cciep3
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:19 ART