I am having a problem with the auto channel configuration by a WiSM at one of my sites. We are running version 4.1.185, and I am seeing AP's in the same hallway on the same channel. This is causing an issue for our IP phone deployment. Has anyone else experceinced the same issues? Are you hardcoding the channels?
You may be suffering from an over-excited RRM. This may be triggered by excessive rogue APs in your environment, or by having the RRM RSSI threshold set too high in a dense deployment. These conditions may cause RRM to overreact, resulting in a race condition where it keeps shuffling the channels in response to perceived interference (exacerbated by coverage hole correction), never reaching a satisfactory arrangement. The APs also have a preference for channels 1 and 36 on bootup. As a
test, remove Rogue APs contribution to Auto-RF, then change the transmit power threshold from the -67 default to -71 to calm things down.