1. From 2.3.7.x, Catalyst Center monitors third-party devices that are RFC 1213 SNMP MIB-II compliant. For details, see the Cisco Catalyst Center User Guide. 2. From 2.3.3.x, Catalyst Center scans End of Life (EoX) milestones for non-air gap customers. Supported devices: switches, hubs, routers, and wireless controllers (IOS/IOS-XE). 3. Devices that have reached their Last Day of Support (LDoS) are removed from the Compatibility Matrix and are no longer eligible for TAC support.