battle@umbc3.UUCP (05/07/87)
I have been given the task of designing a campus lan using both thin and thicknet Ethernet, 3c501 cards and TCP/IP. For starters, can anyone tell me the pros-cons of DACU box vs Sparticus box. Also, if I use SEICOR star clusters with FO links can I place a filter repeater between the two star clusters and have two Ethernets, each star cluster support 1024 devices? Does anyone run IDMS/R on a IBM VM machine with TCP/IP? Can you use the IDMS full screen feature? How about file transfer, line printing, et Thanks in advance... Rick Battle University of Maryland at Baltimore battle@umbc3.umd.edu
leivian@dover.uucp (Bob Leivian) (05/08/87)
> spartacus vs DACU we have a large TCP/IP network with IBM and sun/apollo/pc workstations we evaluated the two boxes for IBM a year or so back and spartacus was a clear win, the DACU uses a PC to control a funny dr11 kludgey (will someone please establish the correct spelling for that once and for all) interface that was 3 or four times as slow as sparatcus which had a channel attached regualar IBM device. The only software avail at the time was U. of Wisc for the DACU, while it was al right it did not match the commercial code from spartacus. while we have had some problems with other tcp/ip interfaces because spartacus is written in IBM ASM and is not state machine driven like the BBN and BERK. versions that most are ported from it matches pretty closely. some other implementations that are written from scratch from the spec have problems talking (the appletalk/tcp gateway 'fer instance sends the initial DO/DON'T sequence with the ack of the SYNC where as most send a separate ACK) > transfer rates we are seeing rates (binary) of about 50,000 bytes/sec to and from IBM using spartacus and some of our faster workstations (sun's). ---- these are my opinions and do not necessarily reflect Motorola -- Bob Leivian Motorola, Dover Shores (CAD Support) 602-994-6778 ...{mcdsun, sun}!sunburn!dover!leivian