When ‘London.PE' receives an Ethernet frame on the attachment circuit from ‘', it encapsulates that frame with an L2TPv3 header/sublayer and send the resulting packet across the IP backbone network to ‘Amsterdam.PE'. The following figure illustrates the process that ‘London.PE' uses to send Ethernet frames over the pseudowire to ‘Amsterdam.PE.': Data channel messages, on the other hand, are the messages that actually carry the Layer-2 protocols and connections over the IP backbone.īelow is a figure that I'll use to illustrate the various concepts and configuration details.Īs already mentioned, an L2TPv3 pseudowire can be used to transport a variety of Layer-2 circuit types, but I'll use an Ethernet port pseudowire between ‘London.PE' and ‘Amsterdam.PE' as an example here.
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