I've been using the DPC3939B through three changes of computers. Two of the computers are using completely new NICs, and as such have different MAC addresses.
For some reason, the DPC3939B fails to recognize that the old machines have been taken online. They still reside under the "disconnected devices" section of the "Connected Devices" section of the management interface.
This causes a huge problem. The computers in question have the same name, and the old one no longer exists for me to be able to change the setting back to DHCP for the given device, so I can give my current machine the same IP address the old one used to have (10.1.10.100). The IP address being 10.1.10.100 is actually quite important, considering the fact that the rest of the network depends on the IP being that one, and not any other. Hence my dilemma.
I cannot, for the life of me, get the router to forget the old IP assignment of the OLD device. I've tried deleting it, and it never gets deleted. It goes from being blocked, to being unblocked and back in the "disconnected devices" listing. Either this modem has some severe issues from a firmware standpoint, or there is just a major lack of PROPER, REQUIRED management options for it.
I need a way of removing and reassigning these disconnected devices, so I can reassign the IP addresses they were originally designated to have. The new machines must take their place on the network, and the way things are now makes it impossible.