When our device receives its network configuration via DHCP it uses the IP address and netmask to determine what IP address range it should scan (via ARP) on the local network. The typical DHCP configuration (and the one we recommend) uses a netmask of 255.255.255.0 [/24] which can support a maximum of 254 possible devices.
However, if the netmask is configured to accommodate a much larger network address range, our device may time out before it can complete each network scan in the allotted time. This can sometimes happen by accident when a private DHCP address is configured on the router and it automatically selects the corresponding class-based netmask. For example, a 192.168.x.x address may result in a 255.255.0.0 [/16] netmask (65,534 addresses) or a 10.x.x.x address could results in a 255.0.0.0 [/8] netmask (16,777,214 addresses). But regardless of the network address being used, we recommend a 255.255.255.0 [/24] netmask for the best scan performance and reliability.