Bug ID 1328985: Disabled interfaces can result in "Optic REMOVED" , "Unable to read optic EEPROM - device is unusable", or "Unexpected NACK detected during I2C transaction" messages

Last Modified: Aug 28, 2024

Affected Product(s):
F5OS Velos(all modules)

Known Affected Versions:
F5OS-C 1.5.1, F5OS-C 1.6.0, F5OS-C 1.6.1, F5OS-C 1.6.2

Opened: Aug 09, 2023

Severity: 2-Critical

Symptoms

Interfaces can go down and "Optic REMOVED", "Unable to read optic EEPROM - device is unusable", or "Unexpected NACK detected during I2C transaction" messages appear in the VELOS log, even for interfaces that have nothing plugged in.

Impact

Temporary loss of connectivity on port group interfaces.

Conditions

-- VELOS system -- Portgroups configured in 4x10GB or 4x25GB mode -- Disabled interfaces in config

Workaround

Ensure that all interfaces, used or unused, are enabled.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips