I believe the version of Linx is 2.52, Logix5000 would have a version like 15.xx or 16.xx
I would assign an IP address first thing because it comes by default as 0.0.0.0. Plug in your ethernet cable (with a switch in between) and open the bootP utility. Sometimes it's quickest to cycle power after you plug in so that you receive bootP requests. Assign the IP address (make it similar to the one on you computer. If you don't know much about IP addresses, we may need a longer discussion on that topic.
Once the address is assigned, you need to load the firmware. You use control flash for this. This can be done via the serial port, but it's wicked slow. Ethernet is preferred. DO NOT POWER DOWN UNTIL THE FIRMWARWE IS COMPLETE. You will make youself a $2500 coaster if you do.
Once the firmware is complete then you need to add an ethernet driver in Linx. There are two ones you can add. Ethernet Devices will allow you to add each address that you want to communicate. Ethernet IP will scan everything on your subnet and find ethernet IP devices (other PLC's, drives, ect). I prefer to use Ethernet Devices because on large networks, you can see a lot of stuff.