Utlize L2TPv3 in the Core?..can you please elaborate a little on the query.
On a overview note:
1) L2TPv3 is a different technology which caters more for L2 forwarding between edges,
where as MPLS is more of a Core technology.
Having many service features under it like, L3VPN,L2VPN,MVPN, TE etc.. So they can not be compared, or other way round its comparing apples to oranges.
Lines can be drawn only between L2VPN and L2TPv3 for comparision.
L2VPN has to be provided to the end user by a service provider (end use also can do it, if he can lay MPLS core between his end sites), where as L2TPv3 can be implemented on your own with plain IP reachability between the end points.
Yeah, you are right! I should have elaborated further!!
1. Actually, with some SP's, MPLS is deployed on the edges (to segregate cust. traffic) while L2TPv3 is deployed in the core. Why complicate matters with MPLS in the core with already IP running-Just a multipoint l3vpn l2tpv3 tunnel would work!!
Whereas I have also seen L2TPv3 work in the edge with MPLS in the core (Lab environment only)....
But thank you for your response.... and Harold's too.
Maybe what is he is looking is MPLS-VPN over IP Tunnel, which using L2TPv3, and since it uses multi point tunnel, each PE will just need to configure 1 Tunnel, and it will dynamically discover the other, PE hence full mesh. See the below link