Bug ID 748443: HiGig MAC recovery mechanism may fail continuously at runtime

Last Modified: May 29, 2024

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,

Fixed In:

Opened: Nov 01, 2018

Severity: 3-Major


At runtime, the HiGig MAC recovery mechanism might be triggered due to FCS errors. Normally, the FCS recovery mechanism corrects the issue. However, if the blade does not recover, the mechanism runs continuously, preventing correct blade operation.


The blade remains in the Inoperative state and cannot pass traffic.


The issue might be related to the traffic pattern the blade is processing.


Manually reboot the blade.

Fix Information

The blade now reboots if FCS recovery is not able to fix the link. The reboot can be disabled using the db variable: tmm.hsb.hgmfcsresetaction

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips