What is MPLS?
MPLS (Multi-Protocol Label Switching) is a packet-forwarding technology which uses labels to make data forwarding decisions. With MPLS, the Layer 3 header analysis is done just once (when the packet enters the MPLS domain). Label inspection drives subsequent packet forwarding. MPLS provides the following beneficial applications: Virtual Private Networking (VPN), Traffic Engineering (TE), Quality of Service (QoS) and ATM over MPLS (AToM). Additionally, it decreases the forwarding overhead on the core routers. MPLS technologies are applicable to