[c-nsp] Pulling a VLAN out of a QinQ trunk

[Chris Phillips]

There is a way that I know, but it's not pretty.

Build the QnQ to an additional port on the device you want to inject/break out the VLAN from.  Make sure it is mode dot1q-tunnel.  Then loop it (cross connect it) to another port on the same device and make that is a trunk port.  Specify the VLAN you want and you're done.

I've done this a few times and it works just fine.  As mentioned, it is not very elegant and someone might know a better way to do it, like tagging the native.  The method described above can inject/break out multiple VLANs, where as fiddling with the native cannot.

Good luck.

----- Original Message -----
From: "Skeeve Stevens" <skeeve at eintellego.net>
To: cisco-nsp at puck.nether.net
Sent: Monday, March 23, 2009 2:57:14 AM GMT -05:00 US/Canada Eastern
Subject: [c-nsp] Pulling a VLAN out of a QinQ trunk

Hey all,

Say I have a QinQ VLAN from one place to another... and it goes through a few switches.

If I wanted to do something to one of the VLAN's inside the QinQ, is that possible?

Examples of things I would like to do.

-       SVI with a IP address in an intermediate switch
-       Push it into a trunk on an intermediate switch to break it out

I've googled, but when I got to PPPoEoQinQ my mind exploded with too many layers!

...Skeeve

--
Skeeve Stevens, CEO/Technical Director
eintellego Pty Ltd - The Networking Specialists
skeeve at eintellego.net / www.eintellego.net
Phone: 1300 753 383, Fax: (+612) 8572 9954
Cell +61 (0)414 753 383 / skype://skeeve
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