I change from DHCP to RESERVED IP on a specific device. I then change the default IP from 192.168.68.123 to 192.168.68.100 and hit save. Get the "saved message" but go back to check and it does show RESERVED IP but it still shows the original IP not the one I changed it to. I rebooted the computer but it made no difference. This is a Xfinity XB6-T Gateway. What am I missing?
You might want to reset the network settings of the computer in question (it's probably latched onto the old IP at this point).