From: Alexandre Ribeiro (alexandregomesribeiro@gmail.com)
Date: Fri Jan 11 2008 - 09:28:22 ARST
This is independent of QinQ and is called L2 protocol tunneling. Simply go
into the relevant interfaces of SW1 and SW4 and configure l2protocol-tunnel
(I think that's the command). Usually you'd do L2 protocol tunneling through
a QinQ tunnel, but it's not necessary.
Alex
On Jan 10, 2008 8:36 AM, Farhan Anwar <farhan.anwar@gmail.com> wrote:
> I think your scenario should be this:
>
> R3 (f0/0) ------- (f0/3) SW1 (f0/x) ----Trunk---- (f0/x) SW4 (f0/15)
> ----------(f0/20) SW2.
>
> And After tunneling it should look like this:
>
> R3 (f0/0) ==================================---------(f0/20) SW2.
>
> But if you are telling that SW2 is not connected to any thing and SW4 port
> is shutdown, means its just a practice of commands for you. You cannot
> verify Dot1x Tunneling if the port is SHUT or the Device (SW2) is totally
> disconnected from the network for which you are tasked.
>
> If things are like what your scenario should be then, What you need to do
> is
> to encapsulate whatever is being recieved on F0/3 of SW1 port into
> Dot1Q-in-Q using a specific vlan such as 500. Then this frame should be
> traveling normally to SW4 via SW1 and SW4 Trunk Links.
> Afterwards on SW4 find the port directly connected to SW2 F0/20 and
> de-encapsulate the frame there.
>
> If the port is shutdown it cannot send any CDP Information, it must have
> to
> be UP.
>
> Make sure VLAN500 exists on all switches in the transit path and Switches
> have MTU 1504 for proper operation. You have to reload the switches for it
> to take effect.
>
> HTH
> Farhan.
> On Jan 10, 2008 2:35 AM, John <jgarrison1@austin.rr.com> wrote:
>
> > I'm tasked with ensure that R3 f0/0 is seeing SW2 f0/20 as a cdp
> > neighboor.
> > I'm to achieve this by configuring SW1 and SW4.
> >
> > My logic goes like this. Do a show cdp neighboors on R3 f0/0. It shos
> > that
> > SW1 f0/3 is my CDP neigboor. I will need to configure one end of the
> > dot1q
> > tunnel in SW1 f0/3. Now I do a show CDP neighboors on SW2 f0/20 this
> > should
> > tell me where I need to configure the other end of the dot1q tunnel. It
> > turns
> > out that SW2 is not connected to anything and is in fact shut. My logic
> > must
> > be faulty. The solution configures a port on SW4 thats shutdown. Once
> > again
> > confused I am. Any help clearing this up would be greatly appreciated.
> >
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>
>
>
> --
> Farhan Anwar
> www.farhananwar.com
>
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