Traffic Engineering includes technology and scientific traffic measuring, modeling, and control principles along with the use of this knowledge to reach certain network performance characteristics.
Traffic modeling makes it possible for a Network Service Provider to direct data flows not via the shortest paths calculated using a conventional routing protocol but via the least loaded ones.
Traffic modeling is very important in view of the fast network resource demand growth, implementation of critical ІР add-ons, and tough competition of the network service market.
Proper traffic loading modeling for all the physical communication links, routers, and switches presumes none of these components to be overloaded or underloaded. The result is to be a more efficient, stable, and predictable network.
The MPLS technology makes it possible for administrators to specify the exact physical paths for a packet delivery, as well as to select those of them meeting specific requirements.
Statistics for every individual LSP route can be used for a link load analysis, a network bottleneck location, and planning further network expansion.
The LSR routers are called LDP peers exchange of information about label. LDP is used to build and maintain LSR databases that are used to forward traffic inside provider‘s MPLS network. But this protocol can not be used in MPLS ТЕ because it does not provide for keeping information about data link load and free bandwidth availability. In this case, the use of the Resource Reservation Protocol (RSVP) makes it possible to guarantee proper bandwidth.