The key performance objectives associated with traffic engineering can be classified as being either:
1. traffic oriented or
A popular approach to circumvent the inadequacies of current IGPs is through the use of an overlay model, such as IP over ATM or IP over frame relay.
Induced MPLS graphs are important because the basic problem of bandwidth management in an MPLS domain is the issue of how to efficiently map an induced MPLS graph onto the physical network topology.
There are basically three fundamental problems that related to Traffic Engineering over MPLS.
–The first problem concerns how to map packets onto forwarding equivalence classes.
–The second problem concerns how to map forwarding equivalence classes onto traffic trunks.
–The third problem concerns how to map traffic trunks onto the physical network topology through label switched path.