Bug ID 758929: Bcm56xxd MIIM bus access failure after TMM crash

Last Modified: Oct 16, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP TMOS(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,,,,,,,, 12.1.4,, 12.1.5

Opened: Feb 16, 2019
Severity: 2-Critical


Bcm56xxd daemon running on B4300 blade might experience MIIM bus access failure after a tmm crash. The system posts a message similar to the following in the ltm log: info bcm56xxd: 012c0016:6: MiimTimeOut:soc_miim_write, timeout (id=0xc9 addr=0x1f data=0x0000)


The affected B4300 blade fails to pass traffic. If configured for high availability (HA), failover occurs.


-- heavily stressed system -- VIPRION b4300 blade.


Reboot the affected B4300 blade.

Fix Information


Behavior Change