Identifies whether or not this device is being managed by the Zhone Management System. This is only settable by the management system and NOT by the CLI as it indicates existence of the manager. Different operations are performed based on this setting (i.e. no configuration synchronization processing is performed if there is no Zhone Management System). Default value is 'false'.
Sources for this description
Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community)