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许多服务供应商已经建好了 ATM 或帧中继网络,并且可以开展第二层的 VPN 服务。有调查指出,近50%的企业用户通过帧中继接入广域网。与此同时,IP网也已大成气候。因此,出现了这么一个强烈需求:将各种类型的第二层网络与 IP 骨干网连接,而且让服务可以在上面传送。MPLS 可以做到这一点,因此为不同的厂家所看好,在自己的边缘路由器中支持这一功能,从老将思科到新军力博、RiverStone,最近都在自己的产品中体现出对这一需求的支持。思科最近宣布为7000中端路由器系列(包括7200、7300、7400、7500和7600)增强 MPLS 功能。思科提出了称之为 AToM(Any Transport over MPLS)的解决方案,让 IP/MPLS 可以提供第二层和第三层服务,在路由器平台上支持 ATM、帧中继、PPP、HDLC、以太网等。力博通讯6月上旬宣布,其 SmartEdge 800路由器基于 RFC 2547bis 标准支持以 BGP/MPLS 技术为基
Many service providers have already built ATM or Frame Relay networks and can conduct Layer 2 VPN services. A survey pointed out that nearly 50% of corporate users access the WAN through Frame Relay. At the same time, IP network has also become a great climate. As a result, there has been a strong need to connect various types of Layer 2 networks with the IP backbone and allow services to be delivered on top. MPLS can do this, and is therefore favored by different manufacturers, supporting this feature in its own edge routers, from veteran Cisco to the new military Bo, RiverStone, recently reflected in their own products this demand stand by. Cisco recently announced the enhancement of MPLS capabilities for the 7000 midrange router series, including the 7200, 7300, 7400, 7500 and 7600. Cisco proposed a solution called Any Transport over MPLS (AToM) that allows IP / MPLS to provide Layer 2 and Layer 3 services and supports ATM, Frame Relay, PPP, HDLC, Ethernet, etc. on the router platform . In early June, Rexroth announced that its SmartEdge 800 router supports BGP / MPLS-based technology based on the RFC 2547bis standard