Router assigning desktop to wrong subnet

[Project86]

I'm looking for help with a recurring and rather annoying issue. My D-Link DIR 855L (the newer N900 version, apparently they started recycling names) assigns all my wireless devices in the range of 192.168.0.100 through 192.168.0.255. But for some reason, it now gives the desktop (connected with CAT5e) 192.168.1.3 - which makes the desktop unable to establish an internet connection.

At some point I got it to assign a proper IP address, and I set a DHCP reservation. That seemed to do the trick until today, when it reverted back to the wrong subnet. I did reboot the router today because I changed some (completely unrelated) settings (related to UPNP stuff, nothing to do with DHCP).

Any ideas about how to stop this?

 

[John Connor]

Check to see if there is a firmware update. UPnP stands for Universal Plug and Prey BTW!

 

[Project86]

Hmmmm.... I seem to have fixed it, for the time being. Powered down the desktop, revoked the wrong IP address and rebooted the router, then turned the desktop back on. It went back to the reserved address I had set prior.

Still, any idea why it does this sometimes?

EDIT - yes, I was using UPnP temporarily before I got my NAS configured. Then I forgot to disable it until today. But no, there is no FW update.

 

[ch33zw1z]

Who's your ISP? What modem model do you have? Sounds like it may be pulling an IP from another DHCP server.

 

[Project86]

Sonic.net for DSL. Modem is an older Zoom 5615 which has been very stable. It's never done this before, and now exclusively does so with the desktop only. Desktop is the only Ethernet connection, everything else is wireless.

 

[unixwizzard]

Any ideas about how to stop this?

you could always set a static IP in your NIC..

for example set the IP as 192.168.0.10, and set the gateway IP using the IP address of the router (assuming) 192.168.0.1

you have the option to enter in your DNS servers or you can let them be set via dhcp..

this way you don't have to deal with a problematic dhcp server giving out an incorrect address.

 

[ch33zw1z]

Sonic.net for DSL. Modem is an older Zoom 5615 which has been very stable. It's never done this before, and now exclusively does so with the desktop only. Desktop is the only Ethernet connection, everything else is wireless.

http://www.zoomtel.com/documentation/adsl/5615_UsersGuide_Eng.pdf

the guide indicates the Zoom would be on a 10.0.0.x network.

Do you have another LAN device you can test with?

A spare router to test with?

 

[JackMDS]

I doubt that it has to do with the Router it is probably some residual issue with the Desktop.

Best thing is to configure the Desktop with a static IP of the subnet of the Router and assign the IP number to be out of the DHCP range.