Multiprotocol Label Switching
MPLS (Multiprotocol Label Switching) is a standards-approved technology for speeding up network traffic flow and making it easier to manage. MPLS involves setting up a specific path for a given sequence of packets, identified by a label put in each packet
thus saving the time needed for a router
to look up the address to the next node
to forward the packet to. MPLS is called multiprotocol
because it works with the Internet Protocol (IP), Asynchronous Transport Mode (ATM
), and frame relay
s. With reference to the standard model for a network (the Open Systems Interconnection, or OSI
model), MPLS allows most packets to be forwarded at the layer 2
(switching) level rather than at the layer 3
(routing) level. In addition to moving traffic faster overall, MPLS makes it easy to manage a network for quality of service (QoS
). For these reasons, the technique is expected to be readily adopted as networks begin to carry more and different mixtures of traffic.
This was first published in September 2001
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