Performance Issues for an IP over ATM Service
			     Bruce A. Mah
			 bmah@CS.Berkeley.EDU
			   The Tenet Group
		      Computer Science Division
		 University of California at Berkeley

The deployment of Asynchronous Transfer Mode (ATM) networks is a
recent development in the field of computer communication.
Integrating this new technology into the existing Internet will
require schemes for managing the transmission of IP datagrams over ATM
networks.  Such schemes will ideally take advantage of the strengths
of ATM, such as QOS guarantees, while efficiently bridging the gap
between the data forwarding models of ATM (virtual circuits) and IP
(datagrams).

In this talk, we present ongoing work in the use of performance
guaranteed virtual circuits to carry Internet traffic on an ATM
backbone network.  In particular, we are investingating the
performance effects of different QOS mappings, multiplexing policies,
and virtual circuit usage policies.  We will also briefly describe the
development of the INternet Simulated Atm Networking Environment
(INSANE), a C++/Tcl network simulator currently under construction to
explore IP over ATM performance issues.