Abstract: Quality of Service (QoS) in Real Time Applications such as video, voice, online gaming is becoming the major concern. In Today’s Scenario Voice over Internet Protocol (VoIP) is an emerging service because of the benefits of this service. The most advantageous benefit which attracts many people using this service is the low cost. QoS is an important factor for the voice traffic. Internet Protocol (IP) network implements QoS in two ways i.e. Integrated Services (IntServ) and Differentiated Services (DiffServ) but still VoIP suffers from delay, voice echo, packets loss or Intermittent silent pauses. Multi Protocol Label Switching (MPLS) is a framework specified by IETF when used with IP increases its QoS. MPLS is used as an extension to IP. In this paper we define the MPLS QoS management and how it supports the IP QoS architecture.

Keywords: Internet Protocol (IP), Multi Protocol Label Switching (MPLS), Quality of Service (QoS), IntServ, DiffServ, Traffic Engineering (TE)