Based On The Optimization Of The Configuration Of Mpls Vpn, Voip Applications

Multiprotocol Label Switching (MPLS) is an emerging technology that aims to address many of the existing issues associated with packet forwarding in today's Internetworking environment. MPLS was created to combine the benefits of connectionless Layer 3 routing and forwarding with connection-oriented Layer 2 forwarding. The MPLS architecture is generic enough to support other applications besides IP routing. The simplest additions to the architecture are the IP multicast routing and quality of service extensions. The MPLS connection-oriented forwarding mechanism together with Layer 2 label-based look ups in the network core also has enabled a range of novel applications, from Traffic Engineering to real peer-to-peer Virtual Private Networks. With the introduction of Multiprotocol Label Switching (MPLS), which combines the benefits of Layer 2 switching with Layer 3 routing and switching, it became possible to construct a technology that combines the benefits of an overlay VPN with the benefits of simplified routing that a peer-to-peer VPN implementation brings. The new technology, called MPLS/VPN, results in simpler customer routing and somewhat simpler service provider provisioning, and makes possible a number of topologies that are hard to implement in either the overlay or peer-to-peer VPN models. MPLS also adds the benefits of a connection-oriented approach to the IP routing paradigm, through the establishment of label-switched paths, which are created based on topology information rather than traffic flow. Multicast is a popular feature used mainly by IP-networks of Enterprise customers. Multicast allows the efficient distribution of information between a single multicast source and multiple receivers. Because VoIP sends voice messages over IP network, include Internet, enterprises can use their existed IP networks to transfer voice and data traffic. This will help them cut down the cost. To achieve this target, QoS is necessary. Quality of Service (QoS) refers to the ability that a network can provide high level priority service. It is a technology used by network to solve delay and jam. In normal condition, it is not necessary to have QoS. But it is necessary for critical application and multi-media application. When the network is overloaded or jammed, QoS can help important business data transferred without delay and drop, keep the network running efficiently. This passage mainly focuses on how to provide QoS for VoIP on MPLS VPN network. Considering the cost and QoS requirement from VoIP, this passage provides reasonable suggestion optimizing the intranet for QoS for voice, video and business data.