[c-nsp] Cheapest Cisco desktop switch that supports Q-in-Q/802.1Q VLAN encapsulation/double-tagged VLANs/Stacked VLANs

[Frank Bulk - iName.com]

So it sounds like if an end-customer wants an *untagged* port off of an SP
switch that there aren't any/many options to deliver double-tagged traffic
to that SP switch.  Sounds like we can have double-tagged traffic between
the core and distribution, but when we bring it to the edge we need to take
strip off the outer tag.

----------------
|    core      |
----------------
       || (double tagged)
----------------
| distribution |
----------------
       | (single tagged)
----------------
|     Edge     | SP switch at customer premise
----------------
       | (untagged)
    customer

-----Original Message-----
From: sthaug at nethelp.no [mailto:sthaug at nethelp.no] 
Sent: Friday, July 09, 2010 3:45 AM
To: frnkblk at iname.com
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Cheapest Cisco desktop switch that supports
Q-in-Q/802.1Q VLAN encapsulation/double-tagged VLANs/Stacked VLANs

> Thanks for explaining the semantical differences.  What I'm looking to do
is
> the termination -- wouldn't the ME3400 do the trick?

No, the ME3400 cannot terminate dual tagged VLANs ("encapsulation dot1q
x second-dot1q y").

Steinar Haug, Nethelp consulting, sthaug at nethelp.no