EVALUATION OF NETWORK PERFORMANCE OBJECTIVES OVER DISN ATM CONNECTIONS

The Defense Information Systems Agency (DISA) has selected the Asynchronous Transfer Mode (ATM) technology as a means to integrate a broad range of information, including voice, video and data applications onto the Defense Information System Network (DZSN). This paper evaluates the network performance objectives over DISN ATM connections for the Constant Bit Rate (CBR) traffic case, as would be typically found when migrating the legacy systems to ATM. A set of representative connections for the transmission topology in the DISN Outside the Contiguous United States (OCONUS) regions is used for the evaluation. ATM network pe~ormance is derived from the accumulation of performance impairments through the physical links and ATM switches encountered in the connection. The results of the evaluation indicate that the latency and jitter pe~ormance of some DISN-OCONUS ATM deployed and remote connections is likely to exceed the international standards specified for CBR traflc