Introduction
The last few years have seen the pace of Multiprotocol Label Switching (MPLS) deployments accelerate in all regions of the globe. MPLS is now a mature technology ready for prime time and able to meet the challenges of 21st century networks. Various factors have driven the adoption of this technology. Initially it provided a scalable architecture through which to deliver Layer 3 Virtual Private Networks (VPNs). More recently, with the surge of multimedia traffic (such as telephony and video) carried on the IP/MPLS backbone, the need for traffic engineering, fast recovery, and differentiated quality of service (QoS) has become apparent. Migration of existing Layer 2 services onto an IP/MPLS infrastructure has also garnered much interest. ...
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