The Multiprotocol Label Switching (MPLS) approach leverages the intelligence of the IP routing infrastructure and the efficiency of Cisco Express Forwarding (CEF). MPLS functions by appending a label to any type of packet. The packet will then be forwarded through the network infrastructure based on this label’s value instead of any Layer 3 information. This ability to label a packet for efficient forwarding allows MPLS to work with a wide range of underlying technologies. By simply adding a label in the packet header, MPLS can be used in many Physical and Data Link Layer WAN implementations.
The MPLS label . . .
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