A school IDF access switch enters a PoE reboot loop, taking down the management VLAN for a small vSphere cluster. NSX-T Manager cannot reach those hosts, and an operator starts deleting Distributed Firewall rules to un-stick the cluster. What should the administrator do?

When a school IDF access switch enters a PoE reboot loop, taking down the management VLAN for a small vSphere cluster, NSX-T Manager cannot reach those hosts, and an operator starts deleting Distributed Firewall rules to un-stick the cluster, treat it as a physical switching and power event: stabilize the IDF switch and management VLAN rather than changing DFW policy. Management isolation from PoE reboot loops is not cured by deleting DFW sections and can make recovery harder. Fix the civic IDF power/switching first. Deleting the Distributed Firewall sections for that cluster because DFW is what reboots access switches fails by concept because DFW does not cause PoE reboot loops on access switches. Re-issuing Carbon Black Cloud isolation to the school VMs so sensors restore the management VLAN fails by concept because CBC isolation does not restore a down management VLAN. Rebuilding Workspace ONE Access policies for teachers, which re-establishes ESXi management, fails by concept because Access policies do not heal ESXi management VLAN connectivity. Exam caveat: Manager unreachable after IDF PoE reboot loop is physical management-plane failure—stabilize switching/power, do not delete DFW. Operational check: stabilize the IDF switch and PoE, restore management VLAN to the hosts, confirm Manager connectivity and cluster health, revert any mistaken DFW deletes, and add IDF power monitoring to the school datacenter facilities runbook for municipal education infrastructure.