My new MacBook Air connects to my local network and the Internet just fine via WiFi but after about 5 minutes (if I'm watching a video, or 50mb if I'm downloading something) it drops the connection. The only way I've found to get it working again is to turn off WiFi and then turn it back on again. I don't know where to turn to get help on this...
Other WiFi connections to the Internet work perfectly, without any stability issues at all. What doesn't work properly is my new MB Air, or any iOS gadgets running iOS 6.x. (I've returned two iPad Mini's because of this problem, thinking that it was a hardware problem with the Mini's and an iPod Touch which was working perfectly with iOS 5.x has also started dropping the connection since I upgraded it to iOS 6.0.1.)
Multiple iPad's (original and iPad2, iPhones (4S's), and iPod Touch work perfectly on the network, as do several PC computers connected via WiFi. I have the same problem at my home and office networks (same configurations) and also had it during a two-night hotel stay when I was trying to use the iPad Mini. It would connect fine, but drop the connection every few minutes.
I'm sure the problem is something in my WiFi routers, (doesn't explain the hotel problem) but don't understand why earlier iOS gadgets work perfectly and newer iOS 6.x or my MB Air do not.
I'm running a Cisco WAP4410N WiFi router, connected by wire to a "switch". Then between the switch and my cable modem, I've got a hardware firewall (Cisco RV220W) with its own WiFi turned off. I don't have a DHCP server, but use Static IP addresses.
If I connect the MB Air directly to my network via Ethernet cable, it works perfectly (suggesting to me that the problem is only in the WiFi part of my network configuration and not related to my Cisco firewall). Also, for testing purposes, if I bypass my entire network configuration and use an Airport Extreme router connected directly to my cable modem, WiFi connections through it to the Internet work perfectly without any drops.
Where/how could I get help solving this? Thank you.