Recently all of my clients were set to ethernet duplex/speed of 100/full. We upgraded all of the switches and they are setup to auto negotiate. So I have have to change all of my client’s ethernet configuration to automatic. Here is a UNIX command that I sent through ARD to update all of my clients on the fly.
networksetup -setMedia en0 autoselect
Refer to the networksetup man pages for many other useful networking commands. In the terminal do:
man networksetup