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Will not release TCP/IP

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4 replies

by fran

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Windows 2000 station connected to Netgear Router. All stations set to obtain IP address automatically and work fine with one exception. Station is using a TCP/IP address from "somewhere" and I cannot find. Have deleted all LAN settings and rebooted many times. This will allow me to setup TCP/IP to attach to LAN and internet, but upon reboot reverts to "ghost" TCP/IP address. I can I permanently correct this?

4 replies

by jim-h

Just a thought:

If you are in fact setting your NIC on the windows box to DHCP and it keeps getting an IP assigned that you can't find what is this address? But any chance is it something like 169.254.0.1 to 169.254.255.254? If your windows box is not getting a response from a DHCP Server this is what it will give itself by default. If this is the case then verify your Ethernet connection to your LAN.

Next, what happens if you release/renew the address via the command line?
Start>Run>cmd
ipconfig /release
ipconfig /renew

Another thought that I have is by any chance does your Netgear router have MAC based filtering on DHCP? Check this to make sure you are not filtering your PC not working.

This is the last option that I have offhand on my mind. Manually set your IP addresses to what it "should" be and connect it to your LAN. See if you can ping your Netgear router. This is to isolate if this is a DHCP or Layer1/2 problem. If you can hit your router then this is a DHCP problem and needs investigation. If you can?t ping then figure that out before blaming the DHCP Server.

Hope it helps?.let me know!
Jim

by fran

Address being assigned is something like 209.183.xx.xxx (not exactly) No MAC addressing on Netgear. Will not release/renew from command prompt, only by deleting in LAN properties. Works fine if you manually set until reboot. Registry problem?

by sgt_shultz

so the question is, what other dhcp servers might be on the network, right? what is the model number of the router. is the router the dhcp server on the network? if so, is the dhcp service turned off the server(s)? or vice versa? there must be tools(or rules) to determine the dhcp server a computer is using...is there anything in the event log on the windows 2000 box?

by joseph moore

Well, when you do IPCONFIG /ALL from the Command Prompt on this machine, what setting does it have for "DHCP Server"?? That will tell you the DHCP Server the NIC acquired the IP address from.
Once you get that, you can see if that is a machine on your network, and you can investigate why it is running DHCP.

hope this helps

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