Thank you for the response. From the Dashboard, the switch is essentially lifeless and shows as "Dormant". Pings to AP's show no sign of life. Pings from any AP, to the switch also fail, but the AP's all show as 'unreachable'. But again, the network, onsite, is all functioning properly. Event log on the switch shows nothing, but Event logs on all AP's show activity up to May 14, then they all end--with no indication of why the communication to the Dashboard stopped?