MPLS Technology

There are three key elements of MPLS

• The MPLS header stack
  • Which contain the MPLS label on which Label Switch Routers (LSR) will forward the packet. Headers can be stacked.
• The enhanced IP routing protocols
  • Which distribute topology and constraint based data
• The label distribution protocols (LDP)
  • The standardized connection establishment protocols through which LSR’s set up a complete path from ingress LSR to egress LSR. This path is known as a Label Switched Path or LSP.

MPLS adds a connection oriented paradigm into IP networks

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