Conclusion
L2TPv3 is a high performance transparent encapsulation protocol optimized for the encapsulation of one protocol (L2&L3)over IP. No change to the network is required (runs over IPv4).
L2TPv3 is designed for delivering L2 services over a native IP network (alternative to draft-martini, AToM, CCC)
Based on a well-established lineage of protocols (L2TPv2 and pre-standards Cisco implementation – Universal Transport Interface (UTI))
A standards track open architecture allows extensibility to many transport types
Efficient simple header for high performance decapsulation
Configuration on edge routers only