Performance of broadcast and unknown server (BUS) in ATM LAN emulation
IEEE/ACM Transactions on Networking (TON)
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In the past 10years, asynchronous transfer mode (ATM) technology has emerged as a key component of next-generation networks. It can offer unprecedented scalability and performance/cost ratio, as well as the ability to reserve network resources for real-time traffic and support for multimedia and multipoint communications. Obviously, in the future information infrastructure, ATM will play an important role. However, today's information infrastructure, e.g. the vast installed base of local area networks (LANs) and wide area networks (WANs) is constructed by using internetwork layer protocols such as IP, IPX and AppleTalk to internetwork the subnets. Therefore, a key to ATM's success and the Internet's further success will be the ability to allow for interoperation between existing network technologies and ATM. The key to such connectivity is the use of the same network layer protocols, such as IP and IPX, on both existing networks and on ATM, since it is the function of the network layer to provide a uniform network view to higher-level protocols and applications [RFC1943, IP over ATM: A Framework Document; A. Alles, ATM Internetworking, Cisco Systems, Inc., May, 1995]. Until now, there have been various different ways of running IP across an ATM network, e.g. LAN Emulation and Multiprotocol over ATM standardized by ATM Forum, classical IP over ATM and Next Hop Resolution Protocol proposed by the Internet Engineering Task Force, IP Switching implemented by Ipsilon Networks Inc., Tag Switching presented by Cisco Systems Inc., etc. This paper gives an overview and an assessment on these proposed schemes.