First thing Physical nic card should support1gbps speed.
Hi, Before doing instalation ESX3.0 /3.5 in workstation 6. You need to add two more lines in .vmx file. Create new VIrtual machine with Redhat Linux 5 64bit for esx3.0. Bydefault VM store in your desktop in Documents/virtualmachine.
Edit .vmx file with notepad add these two lines.
monitor_control.restrict_backdoor = TRUE
monitor_control.vt32 = TRUE
Check another two lines are available or not in .vmx file
ethernet0.present = TRUE
ethernet0.virtualDev = "e1000"