From: Cielieska Nathan (ncielieska@gmail.com)
Date: Sat Jan 12 2008 - 20:11:32 ARST
To add to that.. L2 Protocol Tunneling runs on a 802.1q tunnel (QinQ)
to pass traffic such as VTP, CDP and STP across the link.. if you
need to run any of these three over your providers network to your
"other site" you would need this.
Regards,
Nate
On Jan 11, 2008, at 6:28 AM, Alexandre Ribeiro wrote:
> 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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