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集成路由和交换在Cisco提供可扩展的Internet解决方案的整体战略中,重要的内容是将第三层(网络层)的路由功能与第二层(数据链路层)的交换功能集成在一起。标记交换技术为服务提供商提供三种重要优势: 可扩展性:标记交换技术集成了ATM与第三层的路由,扩展了网络功能。标记交换技术提供了ATM交换功能,全面地集成于Internet核心网络中,包括BGP路由协议,而且避免了单纯在第二层网络上设置路由器所带来的扩展性问
Integrated Routing and Switching In Cisco’s overall strategy for delivering scalable Internet solutions, it is important to integrate Layer 3 (network layer) routing capabilities with layer 2 (data link layer) switching capabilities. Tag switching provides service providers with three key benefits: Scalability: The tag switching technology integrates ATM with Layer 3 routing and extends network capabilities. Label switching technology provides ATM switching capabilities, fully integrated in the Internet core network, including the BGP routing protocol, but also to avoid the simple scalability caused by setting up routers on the second layer of the network