Efficient QoS Implementation for MPLS VPN

Multi-protocol layer switching (MPLS) VPNs are the ideal solution for medium and large enterprises that currently deploy site-to-site VPN services. MPLS provides sophisticated traffic engineering capabilities that, coupled with IP QoS, enable multiple classes of service so business critical applications are treated with higher priority than less important applications and "best effort" services. The popularity of MPLS VPNs as an alternative to private WANs introduces a number of considerations with regard to QoS. In this paper we propose an efficient QoS scheme for MPLs VPN services to meet user peak demand. In this scheme, customers are guaranteed a minimal service however they can exceed their contracted bandwidth and then they are charged for their out of profile traffics.