Bug ID 579210: VIPRION B4400N blades might fail to go Active under rare conditions.

Last Modified: Dec 15, 2020

Bug Tracker

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

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 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, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0, 12.1.3

Opened: Mar 09, 2016
Severity: 2-Critical
Related AskF5 Article:


Over extended periods of booting and rebooting a VIPRION system containing B4400N blades, a switch port connected to the HSB might fail to initialize properly. In some cases, logs indicate an occurrence of the problem in the following form: hgm_fcs_errs[higig mac #] exceeds 1000.


When the problem is manifest, the HSB receives FCS errors at a high-frequency and does not receive any valid traffic from the port switch. The B4400N blade might be unable to go active and join the cluster.


This happens under very rare conditions on B4400N blades; for example, after approximately 8-12 hours of continuous rebooting.


To recover, reboot the system once.

Fix Information


Behavior Change