I posted this as a reply, but thought that I should start a new thread.  Have a home system with about 30-40 Insteon devices on it thru the Eisy and a 2413S PLM.  All of a sudden yesterday, none of the programs and timers were working. My Eisy looked like it had power and the PLM green light on. Was working fine for months and then suddenly nothing.  Could not see the Eisy IP on my router dashboard and would not respond to a ping.  Changed out the network cable, tried different port on the switch, unplugged the Eisy -- still nothing.  Running IoX was useless with it always not finding it- No ISy found.  If I took the Eisy and plugged into a monitor and keyboard, I could see at least something was working on the screen.  tried to ping my computer from the Eisy but got "no route to host" message.  It's like the network portion is down.  Any suggestions?

If you have a VPN try turning it off.

If you enter this address into your browser are you able to see the eisy config file?

https://eisy.local:8443/WEB/sysconfig.txt

Techman

Nope, don't have and never did have a VPN.  Entering https://eisy.local:8443/WEB/sysconfig.txt returns nothing or a message "this site can not be reached".  Neither does " https://eisy.local:8443/desc" when you try to enter it with the Add command in IoX.  Eisy doesn't seem to be anywhere or reachable on my local network. 

Can you bypass the switch and plug it directly into the router?

Also try rebooting the router

Try it on two different switches and directly into the router--no joy.

rebooted the router several times, again no joy.

You could try connecting via wi-fi, It's probably best to submit a support ticket

https://www.universal-devices.com/my-tickets

To put a bow on this, here is the solution. I submitted a ticket on this.  Michel, as always, was right on it wishing an hour.  After trying a few things, he suggested that if I felt comfortable with it, we would just reflect the Eisy. He sent instructions and links for critical files and the system is now up and running.