Bug ID 647151: CPU overtemp condition threshold is 75C

Last Modified: Apr 28, 2025

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
12.1.2, 12.1.2 HF1, 12.1.2 HF2, 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, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0

Opened: Feb 23, 2017

Severity: 3-Major

Symptoms

A CPU overtemp condition is logged when a B4450 CPU reaches 75C.

Impact

Since the temperature threshold is set too low, the warning does not indicate an actual problem.

Conditions

CPU temperature is only 75C and ambient temperature in the blade is in the normal range.

Workaround

None.

Fix Information

The fix raises the CPU overtemp threshold to 88C for B4450. With the fix, the warning should be considered valid.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips