Bug ID 751024: i5000/i7000/i10000 platforms: SFP/QSFP I2C problems may not be cleared by bcm56xxd

Last Modified: May 29, 2024

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

Known Affected Versions:
12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 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,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,

Fixed In:

Opened: Nov 26, 2018

Severity: 3-Major


Messages similar to the following appear in /var/log/ltm: info bcm56xxd: 012c0012:6: I2C muxes are not cleared. Problem with mux 224:


Changes in optic state may be ignored while I2C bus is unavailable.


-- i5000/i7000/i10000 platforms. -- May be caused by a defective optic, rebooting/upgrading BIG-IP, removing and reinserting optics.


For each SFP, perform the following procedure: 1. Unplug the optic. 2. Wait 10 seconds. 3. Plug optic back in. Note: This message might be caused by a defective optic. If error messages stop when one optic is removed, and error messages resume when the optic is inserted, replace that optic.

Fix Information

The I2C bus on i5000/i7000/i10000 platforms now resets the Mux controlling the I2C bus connected to the front panel optics.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips