All of our APs were set to Auto Channel when they were initially installed and configured. I'm going through and hard setting the channels. I have a bunch of APs that won't change to the selected channel. The APs are 3715i running 09.15.02 code configured on a pair of C5210 controllers. I've made sure that I'm on the home controller and that AP is active on that controller. I've tried power cycling the APs. I've tried SSH to the AP and doing a "cset factorydefault". I've tried turning off that radio and then turning it back on. Occasionally, any one of those steps resolves the issue, but there are some APs that no matter what I do will not change the channel. I'm experiencing the issue on both the 2.4GHz and the 5GHz radios.
Any help would be greatly appreciated.
Thanks in advance.