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由于MPLS_VPN(Multi-Protocol Label Switching Virtual PrivaTE Network)技术可以构建支持多业务级别且能够无限扩展的全互联IP_VPN,使得MPLS技术成为VPN系统中的首选,并得到大力推广。同时,QoS(Quality of Service)机制不仅保证网络中各类服务并行操作的有序进行,而且为各种应用提供统一的支持环境。因而,QoS成为MPLS_VPN最有效的补充。阐述MPLS_VPN技术及QoS机制的工作原理与实现方法;对QoS的区分服务(Differentiated Service)原理进行详细的研究,并给出一个解决模型。
Because MPLS_VPN (Multi-Protocol Label Switching Virtual PrivaTE Network) technology can build all-IP_VPN that supports multi-service level and can expand indefinitely, MPLS technology becomes the first choice in VPN system and has been greatly promoted. Meanwhile, the QoS (Quality of Service) mechanism not only ensures the orderly operation of various types of services in the network in an orderly manner, but also provides a unified support environment for various applications. Therefore, QoS becomes the most effective supplement to MPLS_VPN. Explain the working principle and realization method of MPLS_VPN technology and QoS mechanism; conduct a detailed research on QoS Differentiated Service principle and give a solution model.