Carrier supporting carrier: Why not L2VPN?

I'm watching some videos for the SP track and I just started one on CSC
using L3VPN. It seems awfully complicated. I haven't even really gotten
into the configuration of it yet, so maybe I'll be able to answer my own
question shortly, but why not just use L2VPN for this? It seems like you
could accomplish basically the same thing with MPLS pseudowires or
something like that. Or maybe even VPLS or whatever. Not sure about that
since I haven't done VPLS yet. :-)

So, what's the deal? What advantage does CSC via L3VPN bring that would
make it worth all the configuration hassle?

Heck, why not just run MPLS over GRE?

I'll keep watching the video and reading about it. There is probably some
huge advantage that I am completely missing. I'm a noob to some of this, so
go easy on me. :)

John

Blogs and organic groups at http://www.ccie.net
Received on Sat Dec 29 2012 - 18:59:02 ART