AirPort Utility 6.0 Invalid Channel switching from 5Ghz to 2.4Ghz

I have AirPort Utility 6.0 and the older Airport Extreme Oct 2009 (FC340LL/A) without the duel radios. I believe I found a bug in the AirPort Utility 6.0 when switching between wireless modes. When I asked the AirPort Extreme to operate at 5Ghz 802.11n only and picked the channel in the 100's it switch over fine. I realized that the iPhone's must not have a 5Ghz radio in them because it could not find my wireless network anymore. When I went back to the AirPort Utility to change it back to 2.4Ghz .11n or really trying to switch the radio back to 2.4Ghz I kept getting invalid channel when trying to save the config and update. It seems that the AirPort Utility 6.0 would not keep the channel setting saves to what I selected. It did not matter if I picked channel 1 or 11 or automatic. After quitting the AirPort Utility app a few times rebooting the AirPort Extreme a few times the only way around this was to tell the AirPort Utility to default the setting on my Extreme back to factory defaults which changed the radio back to 2.4Ghz mode.
Any suggestions Apple or anyone else ran into this problem?

I am experiencing this same problem. When switching to the 5ghz only radio it reports the channel is invalid when I attempt to update. Whether I choose automatic or any other channel it keeps saying it is invalid. I am running the latest updates on my macbook pro and airport utility 6.0. My airport express is version 7.6.1. It is being run in bridge mode. I also have a time capsule in bridge mode as well.
I am still working on this.

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Does anyone knows why Time Capsule would switch to Ch 1 (2.4GHz) all of the sudden?
I have moved to a different house and here the TC is a little further from the iMac but why is the MBP has the same problem?

Sysco wrote:
Does anyone knows why Time Capsule would switch to Ch 1 (2.4GHz) all of the sudden?
I have moved to a different house and here the TC is a little further from the iMac but why is the MBP has the same problem?
Signals in the 5GHz range drop off faster than 2.4GHz signals when passing through walls, etc.
You might try forcing your Time Capsule to use channels 149 and up. According to the electronic book "Take Control of Your 802.11n Network, version 1.6" (www.takecontrolbooks.com/airport-n), 2009 versions of the Extreme and Time Capsule use higher power in the "upper 5 GHz band".
I have no financial relationship with Take Control Books.

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Hi all I'm completely stumped with this one.
Last night I needed to change the express from N 5ghz to N/B/G 2.4ghz.
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Welcome to the discussions, Jamesn1!
I suggest that you try a factory default reset and then try to reconfigure the AirPort Express (AX) again.
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Hold in the reset button and while you continue to hold the reset button in, plug the AX back in to power
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Trinifoto wrote:
I have a Time Capsule, Base Station and Airport Express
Welcome to Apple's discussion groups.
Please identify the "Base Station". Do you mean an AirPort Extreme Base Station? Are all those 802.11n-capable devices?
the base station wireless mode said 'extend network' the time capsule and airport express wireless mode said 'join network.'
That suggests to me that none of those devices is your "primary" router. If that's the case, what is the brand and model of the device that's connected to your Internet feed or Internet modem?
I believed I overdid it on hitting the time capsule's reset button for a soft reset one too many times and now the slow flicker amber light will not steady itself or move to green and the computer is unable to successfully attach itself to our network.
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Philippe Platon1 wrote:
My Time Capsule is visible in the finder windows as a drive, I am connected to it, and it is my link to Internet, it is visible from my wife's iMac in the next room, but it won't appear in the Airport utility (I can see only the two Air Port Extreme that are in other parts of the house for remote speakers).
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AirPort Utility 6.0 Invalid Channel switching from 5Ghz to 2.4Ghz

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