An easy way to determine the IP subnet of the LAN to which the computers of interest are connected. In a command window (formerly called a DOS Shell), simply type: IPconfig. A sample output is shown below:

Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 192.168.0.112
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1

In most cases, the first 3 sets of numbers in the IP Address shown will the subnet. In this example the subnet is 192.168.0. Consequently, it is recommended to set the EL to an IP address containing the subnet address plus any number extension between 1 and 254 that is not used by another device on the LAN. In this case, the EL device could be set to 192.168.0.132 since no other device has a 132 IP extension on this LAN.

In order to find the existing IP address for all devices on the LAN, you will need to access the router that controls your LAN. It will show you all the IP addresses of all computers and devices presently powered up and connected.