docbjr wrote:First of all, one of the guys here suggested using 2 routers. Is this important and how is it done?
Where is "here"? Are you talking about ethernet routers? Or did he mean "repeaters"? I can't think of any reason to do anything special with your network router(s) for Lutron. They only use the LAN to communicate with Indigo (or other Home Automation system).
docbjr wrote:And second, I am confused about using Insteon with the ra 2 setup. I read that I could use ethernet to communicate with the main repeater for this (is this the same setup that I have used to program the main repeater?) What is the serial input for if Ethernet already works?
You can connect your Indigo server to the Lutron repeater using Ethernet or Serial. Ethernet is recommended. Serial is only really useful for older HA controllers that don't have Ethernet.