A small corporate customer of ours has an office with a wireless network setup running on a Telstra (Aussie Telco) wireless modem router. Running off this device are a small number of WinXP desktops/ notebooks (one is connected via ethernet), one Win7 notebook and a couple of network printers. Everything works brilliantly until they fire up the Netcomm NP-124 Wireless N Extender acting as an access point next door (one of their offices is next door too). Once this happens, at least one user on the existing network gets bumped and can no longer access the network properly (they can't access the internet or any devices on the network). This can only be resolved by turning the Netcomm device off and power cycling the Telstra device.
Being a little stumped and thinking it was an IP range issue, I checked both Telstra and Netcomm devices, but the modem router is handing out IPs from ...0.2 to ...0.80, whereas the Netcomm devices is sitting on ...0.240. Thinking this was OK as there was no IP conflicts with static IPs, etc, I throught that the Netcomm device may have been operating as a DHCP server too, but could find only very small handful of settings to change on it, none of which had anything to do with DHCP.
I'd appreciate any wisdom you guys may have on this - I'm baffled!