L2TPv3 revision notes – architecture

11 03 2008

L2TPv3 has been designed to transport layer-2 frames of various types over a layer-3 backbone.  Some aspects of the configuration are similar to that of EoMPLS – just without the need to deploy MPLS!

Packets are tunneled across the layer-3 network completely transparently, such that the two devices appear to be connected together. In the case of ethernet tunneling, there is no learning of MAC addresses – what goes in one side, comes out the other. That includes CDP, Spanning Tree and so on.

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