I would like to reserve IP addresses for some of my "existing" devices that are currently auto assigned by the router. This is because, occasionally, when the router is rebooted a computer or printer IP will change and I have to reconfigure setting to make things talk again. When following the instructions in the manual (Chapter 12.4 "Specify DHCP Server Settings), I get the warning that the IP I selected was in use, try another. I try addresses inside and outside the "IP Address Pool" and always get the same warning. Is the procedure in the manual is for a new device that has not been connected to the router? If this is the case, what is the procedure for taking an existing device with existing IP router assigned address and changing it to a "Reserved IP Address"? Need step by step instructions. 

      Thanks