Bug ID 456573: Sensor read faults with DC power supply

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 11.5.2, 11.5.2 HF1

Fixed In:
11.6.0, 11.5.3

Opened: Apr 10, 2014
Severity: 3-Major
Related Article:
K16077

Symptoms

While running BIG-IP v11.5.0 or later on a BIG-IP 2000-/4000-/5000-/7000-/10000-series appliances using DC power supplies, error messages containing the following strings may appear in /var/log/ltm: err chmand[####]: 012a0003:3: Sensor read fault for Power supply #1 fan-1 err chmand[[####]: 012a0003:3: Sensor read fault for Power supply #1 meas. inlet temp err chmand[####]: 012a0003:3: Sensor read fault for Power supply #2 fan-1 err chmand[####]: 012a0003:3: Sensor read fault for Power supply #2 meas. inlet temp

Impact

These errors result from a mismatch in the list of power supply sensors queried by BIG-IP, and the sensors actually present in a DC power supply. These errors do not indicate a problem with the power supply in question.

Conditions

- BIG-IP 2000-/4000-/5000-/7000-/10000-series appliances - DC power supplies (FND850 for 10000-series, FND300 for 2000-/4000-/5000-/7000-series) - Running BIG-IP v11.5.0 or later.

Workaround

These errors, when occurring under the conditions described, can be safely ignored.

Fix Information

Power supply sensor values are successfully read without errors on BIG-IP 2000-/4000-/5000-/7000-/10000-series appliances with DC power supplies.

Behavior Change