A node can perform all functions needed in an MPLS-TP network. The node can serve as an edge node where traffic is received on a LAN port, mapped into a
pseudowire and forwarded to the correct label switched path on a WAN port. It can serve as an intermediate node where traffic is transported from WAN port to WAN port based on the label in the MPLS header. Or it can perform both functions at the same time for different services.