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引用次数: 1
摘要
本文介绍了一种ATM局域网交换系统,该系统是为了构建我们的ATM局域网原型而设计的。采用基于IETF RFC1577的“classic IP over ATM”,为ATM局域网用户提供现有的IP业务。此外,该交换系统支持现有局域网与ATM局域网之间的互通。为此,开发了一个特殊的互联单元。它允许现有的局域网用户直接连接到我们的交换机。因此,现有的LAN用户可以将此交换机视为代理。介绍了该互联单元的硬件结构,以及它如何处理ARP和IP报文,从而在ATM局域网上提供无缝的IP服务。我们展示了通过ATM局域网上的互联单元和路由器在主机之间的一些消息流,以解决地址解析问题。本文还简要介绍了ATM局域网路由器。基于IP over ATM,无需修改即可使用现有的路由协议。
The operation of IP and address resolution over the ATM LAN interworking unit
This paper introduces an ATM LAN switching system which has been devised to construct our prototyping ATM LAN. "Classical IP over ATM" based on IETF RFC1577 is applied to provide existing IP services to ATM LAN subscribers. Furthermore, this switching system supports interworking between existing LANs and ATM LANs. To do this, a special interworking unit has been developed. It allows existing LAN subscribers to connect directly to our switch. Therefore, existing LAN subscribers may look upon this switch as a proxy. We describe the hardware structure of the interworking unit and how it handles ARP and IP packets to provide seamless IP services on ATM LAN. We show some message flows between hosts via the interworking units and the routers on the ATM LAN to resolve the address resolution problems. We also address the ATM LAN router briefly. Based on IP over ATM, existing routing protocols can be used without any modification.