I have a 4104, with 4 cameras. 3 of them are Wired to it and one it external.
One of them is a 4421, the other 3 are 4300cs.
The external (a 4300), and the 4421 (wired) seem to be fine, and keep their addresses.
But the other 2 4300C's (wired also) seem to get a new address when the 4104 has...