How could I change my network adapter settings from 10BaseT HalfDuplex to 100BaseTX FullDuplex?

Thanx in advance

You don't write what type of computer you have, but I suppose some sort of Alpha.
There you have to do it outside VMS on the SRM prompt '>>>' set ewa0_mode fastFD
If you want to keep it half duplex use : set ewa0_mode fast. Type : set ewa0_mode
for all other options.

Thanks to ME,
Yes ME, you supposed well, was about an Alpha server 1200.
I changed the setting, it works to 100MB, but seem to be only HD allthough my setting was FD and at the boot time VMS "tell" 100BaseT Full Duplex.
Why I suppose that, because:
1. the FD LED on switch stay off;
2. the server application I use work very slow when the WinNT stations are set to 100FD and pretty fast at 100HD setting...

So, thanks again for your time

You probably use auto detection on the switchport. Have you tried putting the switchport manual on FD ? So both the
Alpha as the switchport 'hardcoded' on
100FD .