I have just installed a Linksys Wireless G Range Expander WRE54G Ver 2 plugged into an ethernet connection that is ultimately wired through a hub to my Linksys Router (WRT54G ver 1 with latest firmware installed). Not an easy install!

Hours on phone with Linksys. I finally got it going, but when I take my laptop into range of the expander I get the message 'Windows - System Error. There is an IP address conflict with another system on the network'. Interestingly no problem when I am in range of my router.

I saw a post addressing this issue with a router. Various suggestions made, such as the possibility of a 2.4 gig phone. Indeed one is right near the expander. I unplugged the phone. Still the message.

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Another suggestion was that there could be an IP address conflict with someone in the neighborhood. I checked and, sure enough, there is another Linksys router (unprotected) in range of the Expander (but not in range of my router). The neighbor has a two bar signal. So now I am suspicious that the neighbor is the culprit. How should a get rid of the conflict? Should I reset the expander, the router - or both in order to reset IP addresses? What is confusing is that if I reset the expander (which alone is in range of the neighbor) isn't it the ROUTER which would dole out the IP addresses?

I am WEP encrypted (128 bit). Comcast would be on the WAN side. You want to change the LAN side, so no you won't need to change anything there. When you change the IP of the router (and expander) it will usually advise a reboot is necessary. Just a 'heads up', I find once in a while Linksys units when you change the IP and reboot they don't come back on line, they seem to hang. Not likely, but if that is the case give it a couple of minutes, then just unplug the power for 20 seconds. They always come back after that.

All you connected devices will need to obtain new IP addresses. If assigned manually/statically you will have to do those, the others, the DHCP ones, just reboot or at a command line (DOS Window) run: ipconfig /release ipconfig /renew. The answer is: no need to reset your router.

Cause: it's useless in your case this is ip conflict cause by neighbor signal your laptop will automatically get connected to nearless router. Solution: disable Automatically conenct to neighbor router to avoid this changes router again follow this instruction Control panel -> Network Connections -> Properties -> Change advanced Settings -> Wireless Networks -> 'enable' use windows to configure my wireless network settings and in preferred networks you will see the SSID of your network, Remove none of your SSID name if listed then klik Ok Hope this help M0b1us. Perhaps I was too hasty. I did take M0b1us advice and was sure to exclude other wireless systems.

Linksys' WRE54G Wireless-G Range Expander [reviewed here] is a WDS-based 802.11b / g repeater that Linksys says works only with its WAP54G access point and WRT54G and WRT54GS wireless routers. Oct 29, 2008  This setup is secured; therefore, before even starting any work with the Range Expander (I have a version 3.0), I accessed the Actiontex firewall via the Dell workstation. I changed the Router Firewall settings to 'Minimal', and I turned off all anti-virus.

But he message has resurfaced about the IP conflict with another system. Does it come and go when some neighbor is firing up his system or turning it off? I may need to try RobWill's advice. However, my problem with this solution is that when I use a new IP on the router, I can't then access the expander - and don't know what address is going to get assigned to it.

I started down the road RobWill suggested and discovered this problem. I suppose I could first give the expander an address using the to-be-given IP on the router.

Of course, I couldn't then reset or auto configure the expander - as Linksys had me do over and over. It appears I wouldn't be able to get into the expander web page (as I have already seen). What also doesn't make sense is that I have never connected to any other network in the area - protected or unprotected. Is this a known issue with Linksys routers and expanders? Could it be a problem just with the Linksys expander?