When I paired the second extender to the network it worked fine at first however after about 5 minutes I noticed there was a conflict where one of the two extenders would loose connectivity to the net. I noticed that whichever Extender had lost connectivity would have a Class B I.P. address for some reason even though each were configured out of the box with Class C addresses. Obviously I thought that there may be an I.P. address conflict at first that both extenders attempting to use the one subnet mask might be at fault and so I tried to set each power line extender to separate sub-net masks. I kept the original extender on 192.168.1.X : 255.255.255.0 I set the new extender to 192.168.10.X : 255.255.255.0 Unfortunately when I change the I.P. address and Subnet mask settings through the bundled TP-Link utility it doesn't seem to save the changes and even on reboot the extender that has lost connectivity will not have regained it and will still have a Class B address of 169.254.X.X. I've a fair bit of experience mucking about with routers etc. but these particular TP-Link extenders are new to me and help identifying the problem would be really appreciated.
Step 1: Please Open Safari type https://192.168.1.254 (the default IP of TL-WA730RE) in the address bar and press enter put in the default username and password "admin" then click Log In.
Step 2: Click Network in the left menu of the management page and change the IP address according to the below instructions:
Step 3: Please go to Wireless->Wireless Settings Select Range Extender as the Operation Mode. Then click Search/Surveybutton it will display all visible wireless signals around your location. Please find the SSID (wireless network name) of your root router and click on Connect then Save it.
Step 4: Please go to Wireless -> Wireless Security page. According to Part 1 of this article we have supposed the router's security type to be WPA2-PSK with AES so here we do the same settings on the TL-WA730RE and input the same password "testtplink" into the PSK Password field then Save it.
Step 5: Please go to System Tools-> Reboot page click on Reboot button to restart this range extender. About 1 minute later the Range Extender should work properly with the Root Router. You can test it like below:
Go to System Tools->Diagnostic in the IP address/Domain Namefield please type in the root router's IP address (we have supposed it to be192.168.0.254 in Part 1 of this article) then click on the Start button.
Step 6: So far we have finished all configurations on the range extender. If the above test shows that TL-WA730RE is configured successfully please go back to MAC computer's Apple menu->System Preferences->Network ->Ethernet change Configure IPv4 back to Using DHCP as it was before and click Apply.
Please contact the support of the router to check it if you are not sure.After you go through all the above steps the Range Extender should get working properly with the Root Router.
How To Configure TP Link Extender?