Windows 10: Devices looking for connection in the wrong subnet

I am the IT tech/network manager for a small company with a moderate size local network. We have all our devices desktop computers, ip phones, ip cameras, wireless devices, etc. connected to a TP-Link router through a combination of ethernet switches and wifi connections. Recently, some of our devices are connecting to the network but not the internet. On investigation, the ip address these failing devices are connected to is 192.168.10.xxx; our router is hosting on 192.168.0.xxx. I have tried restarting, resetting network settings, every troubleshooter related to internet and networking

:)

 

Wifi Devices connecting to the wrong subnet

I just installed a Dlink DIR-890L and it is setup to assign devices to the range 192.168.1.1 to .254





However, it seems that when most of my devices connect they are ending up with an IP address that is 192.168.0.something.

This is causing the device to be able to connect to the router but not to the Internet. It has happened with my laptop, 2 cell phones and wireless thermostat. I have no idea why. Right now I am going into each device and changing the default IP and then manually changing its gateway to 192.168.1.1 (it's also coming up wrong)

I have no idea why this is happening.

I see this in the router settings but there is no where to change the default gateway but I'm not sure if I need to and so far I have been changing it to 192.168.1.1 on all the devices that I have to manually configure/





Any suggestions?

 

Wifi Devices connecting to the wrong subnet

OK thought I had it figured out, but I reset TWO computers that are hard wired to the router and both got assigned an IP address that is 192.168.0.XXX

I have no idea how this can be happening. Only think I can think of is that I changed dlink from being in the 192.168.0.XXX range to the 192.168.1.XXX range and maybe there is a glitch in their firmware.

The router isn't actually in bridge mode, but IP PASSTHROUGH mode, and it is passed to the MAC Address of my dlink router, not sure what else I can do??





The IP Address of router is now showing as my external IP address so the passthrough is working correctly.

 

Wifi Devices connecting to the wrong subnet

Looks like you had two devices running DHCP. First come first serve is how it works. So your "modem" was still acting as a router and DHCP server. Bridge mode stops that.

Regarding the scope. You have it set from 1.1 to 1.254, you can change it but honestly it makes no difference. The protocol has mechanisms to avoid duplicate addressing and not worth the hassle tweaking.

Regards,
Josh