Protocol performance measurements in a heterogeneous network environment

Reported are comparisons of TCP-, XTP11Xpress Transfer Protocol, XTP and Protocol Engine are registered trademarks of Protocol Engines, Inc. (PEI). UDP throughout measurements over an ATM inhouse network, the STM based part of the BERKOM22Berliner Kommunikationssystem. N and a CSMA/CD LAN. The impact of concurrent processes on the throughput performance was observed. XTP has been found to perform as well as and in some situations better than TCP/IP. Both XTP and TCP achieved about 8 Mb/s over Ethernet (ftp ~ 8.7 Mb/s) and more than 17 Mb/s over a 140 Mb/s STM-channel of the BERKOM B-ISDN network (ftp up to 16 Mb/s). TCP/IP throughput performance on the basis of the latest Fore ATM system release available (SBA200 series) revealed a substantial increase in performance compared to previous releases of the Fore ATM network adapter. Experiments have shown that average throughput rates of up to 59 Mb/s are achievable with a SPARCstation 10 based ATM endsystem.