Occasionally, we'll have issues with neighboring APs selecting the same channel on 5GHz. We recently started adding DFS channels to our regulatory domain and have thus far added 4 extra DFS channels. Just from that perspective, there are plenty of channels to go-around.
Most of the channel changes should occur at night when most APs don't have any clients associated. So it may be that AP1, without any clients, changes channels due to interference or free channel, which happens to be the same channel as its neighbor, AP2. Since 'client-aware' is enabled, AP2 may be stuck there until its clients roam/disconnect. I thought about running a script nightly that would disable client-aware, so APs can shift channels at night, but this just opens us up to more channel changes, resulting in a very dynamic environment. I'd prefer to be a bit more stable.
Any suggestions for getting better channel re-use, just short of creating a static channel plan?