[gonvaled]

Usually not needed, since your router will usually try to assign a fixed address for already known devices.

[JdeBP]

What spockz said takes the words "usually" and "try" out of that. (-:

[gonvaled]

But means more work, with web interfaces of varying quality

[voltagex_]

What happens when the DHCP lease expires?

[gonvaled]

The router will try to reassign it, usually.