An IP address within a LAN can either be static and defined in a router or they can be distributed dynamically using the router’s DHCP server. If enabled, the DHCP server will most likely be configured to assign IP addresses within a range. Refer to the picture below of a typical router DHCP page.
In this example, some devices are assigned a static IP, while others use the DHCP server to dynamically assign other devices within the range set between 192.168.0.100 and 192.168.0.199. In this LAN environment (and most other simple LANs), the subnet is defined by the first 3 groups of digits, i.e. 192.168.0.
Unfortunately, EL products connected to the LAN will not be recognized by a DHCP server. Therefore, there is a possibility that the DHCP server may assign the same IP address used by an EL unit to another computer or device on the network. To avoid this potential IP conflict, you can manually assign EL units an IP address outside of the DHCP server range, or create a reserved IP address in the DHCP server for each EL unit. Using either method above prevents the DHCP server from automatically assigning the IP address set within an EL unit to another network device.
The EL unit's IP address would be defined with the same subnet, a trailing number between 1 and 254, entered as a reserved static address within the router or a trailing number outside the dynamic range of a DHCP server (in the example above, 192.168.0.90 would work fine).