At work have two Cisco 5508 Wireless LAN Controllers and a number of Cisco AP’s. We have our wireless network split up into 3 different WLANS with different SSID’s. If you use a Windows computer you can connect to any of those 3 SSID’s without a problem and switch between them as needed. However, when we started to introduce iPads on our network we were able to get them attached to one SSID, but if we tried to switch to another one we would get a message that says “Unable to join network” with a Dismiss button. If you try 3, 4, or 5 times it would eventually switch. This however is very frustrating.
I did some searching and found out that I needed to SSH to both of our controllers and enter the following option: config network fast-ssid-change enable
Once that was done we could start switching between SSID’s without any problems.
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