Service provider provision l2 circuits for the customers where customers need to extend the lan services to the remote offices. Provisioing of l2 circuits does in two ways; one over ip cloud and another is over mpls cloud. But sometimes customers wants to forward the jitter senstive traffic over the backbone and to fulfill the SLA service provider need to forward the l2 traffic over another path which is not best in IGP. For this traffic engineering plays a vital role with fallback mode. In the next post I will be posting how to configure MPLS TE for l2 circuits.