We currently have 250+ AP1020 and AP1220s deployed. Every two to three weeks, an AP randomly stops getting associated with the LWAPP controller. The odd thing is how this phenomenon only effects one AP at a time ...seems like 1 is always getting left out.

If left alone, after 2 to 5 days, the problem fixes itself ...the AP in question starts working again, but another one gets left out in the cold.

This has been an ongoing cycle for the last four months. It's not a major problem. ...solutions for it that I have done include replacing the AP, restarting the AP and doing a shut/noshut on the switchport it's connected to, or just waiting it out.

I really just want to know why this is happening, is it happening to anyone else, and how can I get it to stop?