When to do the QinQ

Hello all,

I have seen numerous tasks in R&S workbooks with regard to L2 Tunneling
being answered with automatic QinQ config at point exit/entrance of the
tunnel.

==========================
system mty 1504

int gi1/0/x
switch access vlan Y
switch mode dot1q-tunnel
l2protocol-tunnel cdp
l2protocol-tunnel stp

int gi1/0/w
switch access vlan Y
switch mode dot1q-tunnel
l2protocol-tunnel cdp
l2protocol-tunnel stp
==========================

Shouldn't the first task being to identify what is going to be connected at
the entry point of the tunnel?

let's say it is a L3 interface, then there is not need for the QinQ to bring
up the tunnel.

the above will then translate to:
==========================
int gi1/0/x
switch access vlan Y
switch mode access
l2protocol-tunnel cdp
l2protocol-tunnel stp

int gi1/0/w
switch access vlan Y
switch mode access
l2protocol-tunnel cdp
l2protocol-tunnel stp
==========================

--> Now if effectively a L2 trunk is going to be connected, then the QinQ.

Should I just see this type of question like "just make sure anything the
customer connect at entry point of the tunnel should go through?"

Thanks in advance

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Received on Thu Feb 24 2011 - 14:16:09 ART