INTERNETWORKING OVER ATM - EXPERIENCES WITH IP IPNG AND RSVP/

This paper describes recent experiences with evaluating and implementi ng advanced internetwork communication protocols on top of ATM. First, performance results with conventional TCP/IP over ATM based on Digita l Equipment's Gigaswitch/ATM are reported. It becomes obvious that cur rent protocols must be tuned specifically in order to exploit ATM perf ormance. In order to address advanced quality of service issues based on resource reservation, the paper describes an implementation of IPng (TP next generation) and RSVP (Resource Reservation Protocol) over AT M. Solutions for mapping quality of service and traffic parameters in an adequate way are presented. Moreover, the issue of address mapping from IPng onto ATM is discussed. Implementation results and experience s in these areas are illustrated. Finally, ongoing current work on res ource reservation in advance is presented. It is outlined that longer- term resource planning and scheduling provides additional benefits for selected ATM applications.