Name: ernie99 Date: December 14, 2007 at 13:33:05 Pacific Subject: IP Address Conflict OS: XP Sp2 CPU/Ram: 2.6GHz/3.0GB Model/Manufacturer: Various
Comment:
Hi everyone, I am getting the recurring error message 'there is an IP address conflict with another system on the network'. So just go and find the device that's conflicting and change the IP address right? It's not that simple. I have identified all of the devices on my network (there are only 6) and there is no conflict.
I believe the cause of the problem to be one of three things.
(1) I recently removed a network bridge from the workstation that is having the problem. There could be something strange with Windows as a result of this, particularly because I can still use the LAN and access the Internet even when this so called conflict is occurring (I didn't think that would be possible with a genuine IP conflict).
(2) Someone has connected to my network without me knowing about it either through the wireless LAN (which has 128 bit WEP encryption and MAC Address filtering enabled so unlikely) or through some kind of VPN maybe? If this is the case then they are using a static IP address as I have checked the DHCP leases and only three have been handed out to legitimate machines.
(3) The error message is some kind of spoof and is actually a virus or spyware on the workstation. I don't think this is the case as I have full time antivirus software installed and regularly run scans with such tools as spybot search & destroy, hijack-this etc.
Thank you both for your posts. To answer wanderer's request the exact message is
Windows - System Error There is an IP address conflict with another system on the network.
I believe that this message is genuine rather then spyware. I am now fairly sure that the conflict is being caused by the 'Tunnel adapter Automatic Tunneling Pseudo –Interface:'. I have posted the results of running IPConfig /all on the problem machine. You will see that the wireless NIC and the 'Tunnel adapter Automatic Tunneling Pseudo –Interface:' appear to have the same IP address.
If I'm on the right track how do I get rid of this 'Tunnel adapter Automatic Tunneling Pseudo –Interface:'? It is not in my list of network connections. Here is the results from IP Config /All (It's not very easy to read sorry).
Windows IP Configuration Host Name MYHOST Primary DNS Suffix MYDOMAIN.Local Node Type Hybrid IP Routing Enabled No WINS Proxy Enabled No DNS Suffix Search List MYDOMAIN.local
Ethernet adapter Wireless Network Connection: Connection-specific DNS Suffix MYDOMAIN.Local Description Linksys Wireless-G PCI Adapter Physical Address <MY-MAC-ADDRESS> Dhcp Enabled Yes Autoconfiguration Enabled Yes IP Address 192.168.1.30 Subnet Mask 255.255.255.0 IP Address fe80::216:b6ff:fe9c:71be%4 Default Gateway 192.168.1.1 DHCP Server 192.168.1.9 DNS Servers 192.168.1.9 Primary WINS Server 192.168.1.9 Lease Obtained Friday, 14 December 2007… Lease Expires Saturday, 22 December 2007…
Tunnel Adapter Teredo Tunneling Pseudo Interface: Connection-specific DNS Suffix Description Teredo Tunneling Pseudo-Interface Physical Address FF-FF-FF-FF-FF-FF-FF-FF Dhcp Enabled No IP Address fe80::ffff:ffff:fffd%5 Default Gateway NetBIOS over Tcpip Disabled
Tunnel adapter Automatic Tunneling Pseudo –Interface: Connection-specific DNS Suffix Description Automatic Tunneling Pseudo-Interface Physical Address C0-A8-01-1E Dhcp Enabled No IP Address fe80::5efe:192.168.1.30%2 Default Gateway DNS Servers fec0:0:0:ffff::1%1 NetBIOS over Tcpip Disabled
I have removed the 'Tunnel adapter Automatic Tunneling Pseudo –Interface'. It is related to IP V6. To remove it go to the properties of the network connection select IP V6 and press the uninstall button (Note: You'll have to restart before changes come into effect).
I am still receiving the error message. Windows - System Error There is an IP address conflict with another system on the network
I was hoping that getting rid of the 'Tunnel adapter Automatic Tunneling Pseudo –Interface' would solve the problem but it hasn't. It doesn't matter which IP address I choose I still get the error which makes me think maybe virus/spyware. I have run Spybot S&D which came up with nothing. I will try different antivirus products.
Anyone have any ideas?
Here's the latest result of ipconfig /all
-------------- Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp.
Hi all, just wanted to post to say that the problem has gone away. Thanks to everyone for their input. I am still none the wiser about what caused the problem. I definitely checked and double checked all of the devices that required an IP Address (there were only 6 of them after all) and there was no conflict. I remain suspicious about the Tunnel adapter Automatic Tunneling Pseudo –Interface however removing this did not immediately fix the problem so it may be a red herring. Anyway thanks again for your posts.
I am having a similar problem - I get the message no matter what IP I choose, and it's always the same hardware adress (since everything works anyway, I haven't yet taken the trouble to find out what machine it is). Recently, my computer was down and I borrowed another computer from the same network, without changing its IP (it had not shown any similar messages before). Surprise: same conflict message! My conclusion is that it somehow has something to do with my usb wireless network adapter (Linksys WUSB54GR), which I plugged into the borrowed computer. Also, now that I have changed hard drive and re-installed windows on my own computer, it still displays the same message, even before I had actually set any IP to it (so virus/spyware should be out of the question). I know, I guess I should identify that hardware adress... any other suggestions?
Hi Andy72. After a lot of head scratching about this problem I have discovered that for me it is caused by my Linksys WRE54G Wireless Range Expander. Basically whenever the WRE54G is turned on I get an IP address conflict message constantly popping up on my xp workstation even though I know the WRE54G is statically assigned 192.168.1.240 and that no other devices are using this address. When you change the IP address of the workstation getting the conflict message the problem does not go away. I have spoken to Linksys about this and they have been less than helpful. For more info see this forum http://forums.linksys.com/linksys/b... I am interested to know whether you also have a WRE54G or whether this problem manifests itself with other Linksys hardware.
Ernie99, The WRE54G is indeed the wireless range expander we have. It would seem that Linksys has a serious bug to fix... Googling this problem, I found a number of situations that seemed similar, but no explanations other than the one on the Linksys forum page. Guess I'll try and see if I could do without the range expander. Thanks - it's nice to have a cause identified, although no solution so far...
I also found the same problem, when trying to create bridge between Wireless LAN (on Zyxel G-220,G-202) and Local LAN, any IP I change will create IP Address Conflict, as I try to disable "ArpRetryCount" to 0 but error still show. I try to do problem separation by change Wireless H/W to some other Wireless LAN (Intel Pro) it's work.
I think that it's bug on XP for some Wireless Device only.
I hope that someone can solve the problem, I also waiting for it!
