I have an Xfinity (Comcast) provided Modem/Router combo that's been acting strange recently. It's a DPC3941T manufactured by Cisco.
I have the router set on a 255.0.0.0 subnet with DHCP enabled for the addresses 10.0.0.1/24 and Wi-Fi is disabled. I have a Ubiquiti Unifi AP Lite for the Wi-Fi access throughout my home.
But what I have noticed recently is that the router seems to be handing out IP's on a completely different subnet. And all of these other IP's have no similarity other than the 10 at the start. Here is a screencap of the offending devices.
None of the affected devices have restricted access. Speeds are the same as usual and I don't really have a way to determine if they are accessible from other subnets however, chromecasts still work.
Any ideas as to how to fix this? Or should I just let it be since nothing seems to be affected?