Thanks :smileyhappy:
I think the main problem you were having was the IP Address conflict. You solved that by configuring the EA6500 with it disconnected from the network.
Depending on the EA6500 feature you require a LAN to LAN setup may work for you. That were the EA6500 Internet Port is not used and you specify a static IP on the same network as the ActionTec.
The MoCA adds some complexity to the network implementation but I found a nice article that details many network setups for MoCA networks.