Ошибка в логах Zabbix-server: Operation timed out after 3001 milliseconds
Полный текст ошибки:
became not supported: Cannot perform request: Operation timed out after 3001 milliseconds with 0 out of 0 bytes received
Возможно дело в Timout в настройках Zabbix server:
### Option: Timeout # Specifies how long we wait for agent, SNMP device or external check (in seconds). # # Mandatory: no # Range: 1-30 # Default: # Timeout=3 Timeout=15