Last Modified: Jan 24, 2024
Affected Product(s):
BIG-IP AOM
Known Affected Versions:
11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6
Opened: Oct 03, 2013 Severity: 3-Major Related Article:
K15208
Blade point of load power supply faults may be incorrectly captured and logged during chassis power cycle and card pull events. The blade AOM function continuously monitors the blade health for reporting of hardware failures to the system layer. This AOM function is on standby power and is operational whenever chassis power is present. If the chassis or the entire blade powers down through an intentional or unintentional action, power health monitoring is indeterminate and incorrect power fail event status may be captured. The blade point of load +5V, +3.3V, +1.5V, +1.1V, etc power supply status is stored by the AOM in non-volatile memory. The information is saved in memory forever until reported and cleared by the application layer. Thus any transient power fail status captured during a power down is unintentionally logged by the application layer on the next power-up. This issue has been observed only on a few blades with very low frequency of occurrence during rigorous power cycle testing.
Incorrect power fault status may be reported in the system logs and maintained on the blade until the log files are over-written or deleted. This may cause confusion or concerns when viewing the system log files that a hardware issue exists. If point of load power fail system log messages are observed, you must qualify them with system main power events to discriminate between false positive errors and actual power supply faults.
This condition although very rare and can occur during chassis power cycles. It can also occur during a blade pull while servicing a system in operation.
Recommended process is to power down the blade prior to turning off chassis power or removing the blade from the chassis. Normal controlled blade power down events are unaffected by the issue.
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