In MPLS, what is the primary function of Edge Routers?

The primary function of Edge Routers in an MPLS (Multiprotocol Label Switching) environment is to route MPLS traffic into and out of MPLS networks. These routers operate at the boundary between the MPLS network and the external networks, effectively facilitating the entry and exit of data packets. They handle the labeling of packets going into the MPLS network by adding MPLS headers, enabling the forwarding of packets based on these labels instead of traditional IP addresses. They are also responsible for stripping off these labels when packets exit the MPLS network, returning them to their original format for delivery to the final destination.

By performing this crucial function, Edge Routers enable seamless connectivity and facilitate the integration of various network types, providing a bridge between different networking environments. Their role is essential for ensuring that data packets can be transferred efficiently and accurately across different segments of the network.