Bug ID 631700: sod may kill bcm56xxd under heavy load

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1

Fixed In:
13.0.0, 12.1.3.2

Opened: Dec 04, 2016
Severity: 2-Critical
Related Article:
K72453283

Symptoms

Under heavy load, bcm56xxd may not get enough CPU cycles to finish some of its operations and activate the watchdog process. In that case, sod will suspect that bcm56xxd has halted and terminate the process.

Impact

The switch will not operate during the restart, and traffic might be interrupted.

Conditions

When the system is very busy, tmm has higher execute priority, and bcm56xxd does not have enough CPU cycles.

Workaround

Reduce the traffic to make the system less busy.

Fix Information

The system now has bcm56xxd activate the watchdog so that sod does not terminate the bcm56xxd process.

Behavior Change