i have 2 6504 w WiSM in each...just yesterday i began seeing "lost heartbeat with supervisor" on the traps on all 4 WLCs exactly one per minute. The WLAN is operating fine but I am concerned about the traps. We upgraded from 3.2.150 to 4.1.181 2 days ago. We also made changes to ACS and added a couple of WLANs and interfaces. Nothing that should have affected the WiSM??
Has anybody seen this error before?