Last Modified: Apr 19, 2025
Affected Product(s):
F5OS F5OS-A, F5OS-C
Known Affected Versions:
F5OS-A 1.5.0, F5OS-A 1.5.1, F5OS-A 1.5.2, F5OS-A 1.5.3, F5OS-A 1.7.0, F5OS-A 1.8.0, F5OS-C 1.5.1, F5OS-C 1.6.0, F5OS-C 1.6.1, F5OS-C 1.6.2
Opened: Aug 07, 2024 Severity: 3-Major
A system may experience an intermittent inlet temperature sensor fault that resolves itself quickly (within 5-10 seconds). A system may also exhibit an abnormal inlet temperature value (of -40.0 degrees C, for example).
For an intermittent temperature sensor fault, the system may log an event when the temperature sensor fault resolves. The event entry will indicate the measured inlet temperature after sensor fault resolution. For example: 2024-08-02T06:58:30.719387+05:30 controller-1 alert-service[9]: priority="Notice" version=1.0 msgid=0x2201000000000029 msg="Received event." event="65546 controller-1 thermal-fault EVENT Network Access 'inlet at +26.4 degC' '2024-08-02 01:28:30.667243859 UTC'". Note that this is an "EVENT" entry with "NA" severity. This is _not_ an indication of an actual thermal fault. An inlet temperature of 26.4 degC (as in this example) is well within operating limits. Should an actual thermal fault occur, it would be an "ASSERT" entry with an appropriate severity level (e.g. "CRITICAL") depending on the inlet temperature value and thresholds. For an abnormal temperature sensor value (of -40.0 degrees C, for example), there will likely be no indication in the logs. For both cases, system operation is not affected.
- r5K/r10K appliances - VELOS system controller The temperature sensor IC used for the inlet temperature measurement has an errata that may cause an intermittent temperature sensor fault or an abnormal temperature value to be read from the device. Not all temperature sensor devices exhibit this issue. The occurrence of this issue is unpredictable.
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