MPLS technology is a new technology that successfully addresses the issues that face today's networks. This is an improved method for forwarding packages through networks using information contained in labels attached to IP packages. In the network core of the internet provider MPLS technology is mostly used for simply creating virtual private networks (MPLS VPN), for ensuring quality of services (QoS) and for effective traffic engineering (MPLS TE). In this article, special attention has been given to traffic engineering (TE). Traffic engineering is a set of services that are being carried out in order to improve overall network utilization. MPLS traffic engineering has the ability to explicit routing, which allows the network an evenly load and effectively avoids possible congestion of nodes and paths. At the end of the article results of experimental measurements on real networks are presented. Throughput and round-trip time (RTT) are measured in the cases of traditional traffic management and in cases of MPLS traffic engineering.