xcmHrDevAlertTable — Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community)
A table of the device alerts which have been generated and recorded on this host system. Certain devices can be associated with specific alert tables defined industry wide for the specific device. This general alert table is designed to work with these other alert tables. At this time, the only device specific alert table is prtAlertTable in the printer MIB. See xcmHrDevAlertCodeInteger and xcmHrDevAlertDevAlertIndex for connections to the device specific alert table. Usage: Conforming implementations SHALL ensure that this table contains (up to) a product-specific number of the most 'recent' device alerts on this host system. Usage: When an event occurs that should be reported through the Alert table, the implementation SHALL create an alert for each device impacted by the event. This SHOULD include all logical devices containing the impacted device. All such alerts SHALL have the same index 'xcmHrDevAlertIndex.' Usage: If the hrDeviceIndex is an hrDevicePrinter, then the product SHALL also generate an alert in the IETF 'prtAlertTable.' The index 'prtAlertIndex' for the associated printer alert table entry SHALL be returned in 'xcmHrDevAlertDevAlertIndex' for the 'hrDevicePrinter' index. Management tools can use the value of 'xcmHrDevAlertDevAlertIndex' to associate printer alerts with alerts in this table. Usage: Conforming implementations which also implement the System Fault group SHALL record in 'xcmHrSystemFaultTable' each persistent system fault when it occurs and is recorded in 'xcmHrDevAlertTable'. Usage: Conforming implementations MAY 'age' older entries out of 'xcmHrDevAlertTable' based on algorithms which depend on the age of the entry and the particular alert. When the number of alerts in the table exceeds the product-specific maximum number of alerts, the oldest non-critical alert SHALL be removed. If there are no non-critical alerts, then the oldest critical alert SHALL be removed.