Today I upgraded from my several year old Airport Extreme (3rd gen) and 2nd gen Airport Express to a new (what you'd buy on the shelf today) Airport Extreme and Airport Express. All airports are updated with the latest firmware and I'm using windows 7 for configuration.
The intention is to use the Airport Extreme as the main router, also serving wifi. And extend the network using the express. As such, the following has been done:
The Airport Extreme is configured for automatic channel, and automatic radio mode. I tried to select 802.11n 5 ghz and 802.11 n 2.4 ghz only, but it won't take the changes. Additionally, it wont' accept me using only channel 6. Not sure why, but I digress. The airport extreme is not set to broadcast a separate name for the 5ghz network.
The Airport Express is configured to use bridge mode, use an existing wireless network and is connected to my network on it's WAN port (the circle icon on the back) with ethernet. The password and wireless name used in configuration is the same as created initially on the Airport Extreme.
Initially I did the configuration of both airports on my computer, connected by ethernet to ensure stable connectivity while I inputted settings. During this, they appeared to accept the changes fine. However, when I moved the airport express to it's destination (other side of my house), the entire network went crazy.
Internet became slow, and often wouldn't load pages. This was on wired and wireless connections. When I attempted to administer the Airport in the Utility, they would not load, an error would occur. Also, at one point the Airport Extreme had renamed it self with a (2) at the end. Which was super odd. So far, the only solution has been to unplug the Airport Express and attempt to devise a solution.
Anyone have any ideas? Of course, I will continue to tinker with this, but it seems realllly strange. The previous setup was also extended (granted, using wireless only, not ethernet > wireless) and worked fine, granted it was a smidge slow, but it worked.
