Currently, I have Dual-band Linksys WR600N which is working fine. I just bought a Airport Express to wirelessly extend my wireless network. However I had a Dual-band network, so I set the Airport Express to use the 5GHz frequency which works great. I have set my second router to connect using Ethernet to the Airport Express; I'm having problems getting a IP address from my main router. Basically: --- Wireless, === Ethernet Internet===Modem/Router===Switch===Wireless AP---Airport Express===Wireless AP. Current last wired connection doesn't work. I tried connecting directly from my computer to the AE using Ethernet and I can't get an IP either; however I can connect wireless to the AE and get an IP and go online. I have no idea why the wired port is not working for me. I have this enabled: How do I get the Ethernet port to work? Thanks in advance.