I had a similar problem after upgrading this morning.
Well, the UI message was the same, not sure about the Console messages.
Bizarrely after trying repeatedly, including rebooting computers, airport, etc. I left it for half and hour and came back the problem had disappeared and everything is now working fine.
I cannot explain what happened or why but my network is reliant on two Airport Express units to connect to the Time Capsule, i.e. ADSL Router -> Time Capsule -> Airport Express -> Airport Express -> MacBook Pro.
Perhaps it took a while to sort out the overlapping wireless networks which was a new feature of this version of the software.
FWIW, my update went smoothly.
My setup is:
ipod touch v2
3 Airports with ethernet connection (1 creates an N network)
2 AX units that connect to the N network created by an AX
1 AX that connects to a linksys wireless G network
All AX units are the newer N version
Remote app on all the portable devices continues to work
Airfoil still works
Didn't have to reset my network, it all worked without a glitch
It didn't even work when I connected a "fresh" Express to the Extreme (with wiresless disabled). The Express functioned as a bridge, so the Extreme did all the DHCP and stuff and I still received "No Ack". I've been doing quiet some networking with several Extremes and Expresses in a WDS network, never saw anything as strange as this.
What worked in the meanwhile: I put the Extreme in 802.11n 5 GHz mode. It's a temporary fix cause my iPhone4 doesn't support that. But at least it works again.
Thanks guys for your replies.
I updated to 7.6 and can only connect with some devices:
iPhone 4S (AT&T, iOS 5.0.1) - can connect
iPhone 4S (Verizon, iOS 5.0.1) - cannot connect
iPad 2 (iOS 5.0) - can connect
iPad 1 (iOS 5.0) - cannot connect
iPhone 4 (iOS 5.0) - can connect
iPhone 3GS (iOS 5.0) - can connect
AppleTV 2 - can connect
AppleTV 1 - can connect
MacBook Pro - can connect
Update: Downgraded to 7.5.2 and all devices can connect again.
Update 2: Re-upgraded to 7.6 and all devies can connect.
OK, after d*cking around with my wireless for most of the day after having done the 7.6 upgrade I was finally able to get everything working again by doing the following:
1. Upgraded all to 7.6
2. Reset Time Capsule and reconfigured. Note: If I tried selecting the "Allow network to be extended" checkbox, I would lose it again upon updating and have to reset once again.
3. Reset AEBS's, reconfigure, selected "Use ethernet to connect to and extend my existing network" (not sure if that is it verbatim, but you get the idea).
4. All working again, network extended again, in spite of NOT being able to select the "allow network to be extended" checkbox on the TC setup. just double checked with Airport Utility, and it did not autmatically become selected by virtue of adding on the AEBS's the way I did.
Works beautifully for me now - YMMV
< Edited By Host >
I just upgraded. The first issue I had was the airport utility would no longer automatically discover the basestation. I have to manually enter the IP every time. Anyone else have this issue?
As for device connectivity, I only tried one so far device- Win7 and it connected fine to the network.
I am certainly not suggesting that the problems above did not occur.
I do want to indicate to others that read this thread that the 7.6 firmware update for my Airport Express worked properly (in my case). I only have two devices that connect wirelessly and both work just fine. The Express is used as a bridge. I did open the Airport utility and when it detected the update, I let it do its thing.