1 Set router to fixed channel, 2 or above.
2 Reserve IP and MAC for each camera, etc., in LAN settings.
However, this may or may not be necessary.
I had my router set to “Auto” for channel selection (2.4GHZ). Every time it changed channel one or more cameras would lose connection. Router was set to reboot once each week and the same thing happened.
I tested an Asus and Netgear routers and maybe 1 out of 3 or 2 out of five cameras would not connect on channel 1.
After fixed channel and IP & MAC reservations my cameras never lose connections even after a reboot.