I have a 10 MBit network with 50 computers. A Novell server and two linuxmashines. It is connected to a wan with a leased line at 512 KBit (via a router). All computer are connected to one segment.
NIC all 3Comm Ethernet 10 and 100 (3c90x)
Hub Superstack II 10/100 Autosensing
Older FMSII 10 base T
Computer Siemens Nixdorf
Kable is cat 5
When I enable 100 MBit on the server the performance is good only between the server and the workstation who have 100 MBit enable. Other devices has approx 1/4 of 10 MBit speed.
I have tested 100 MBit card with Autosenseng, and without, Full duplex and half duplex. Everything works but the speed is not acceptable.
What is wrong?