[SOLVED] Router assigning incorrect IP addresses (192.168.0.xxx vs 192.168.1.xxx)

[MIDave]

My router has started assigning 192.168.0.xxx addresses instead of 192.168.1.xxx

An example of what it does:
I rebooted the router (wired connection) and it assigned my office computer (wired connection) a 192.168.0.xxx address, even though it has a DHCP reservation for 192.168.1.190. ipconfig release and renew will bring it back to the correct IP.

EVERY device is being treated the same way. Computers, tablets, TV, Android, i-phone, the thermostat, etc... it's definitely something with the router itself.
I've had to assign a DHCP reservation for everything I want to connect

It seems to be assigning ipv6 addresses ok, fwiw. Had a laptop that had no connection on ipv4 but was connected on ipv6, so I could actually see part of the internet.

Linksys WRT1900ASC router
Start IP is 192.168.1.100
Router's IP is 192.168.1.1
DHCP is turned on
Running the latest firmware, which is from 2018. I tried the ~5 yr old previous version and got the same behaviour.
I haven't changed settings in the router in a very long time.

Thanks for any help!
Dave

 

[bill001g]

Are you sure it is that router assigning the IP.

Most consumer routers are pretty stupid. They generally will not even let you configure a dhcp range different than the main lan subnet. I assume the lan IP is still 192.168.1.1 ?

Maybe try to turn off the dhcp server and see what happens. I suspect you have another device on your network with a dhcp server function.

 

[MIDave]

I suppose I was making the assumption that it's the router, so no, I'm not absolutely certain.

What the heck else on my network could have the DHCP server function, and how would I go about finding it?

 

[MIDave]

I tried connecting to wifi from one of the laptops in the house.
It received an IP of 192.168.0.90 (or whatever) and ipconfig /all revealed a DHCP server of 192.168.0.50

Disabled the DHCP in the router as suggested. Ended up with a 192.168.0.xxx IP on my hardwired office computer. Went to 192.168.0.50 and low & behold, it was the D-Link DAP-1325 that I have upstairs which had been configured as an access point. Unplugged it and all seems normal again.

Thanks!!