Bug ID 1345977: VELOS interfaces flapping if an interface is disabled

Last Modified: Apr 28, 2025

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

Fixed In:
F5OS-C 1.8.0

Opened: Aug 30, 2023

Severity: 2-Critical

Related Article: K000136113

Symptoms

After disabling an interface on a VELOS blade: -- Interfaces intermittently start flapping UP/DOWN. -- "Optics removed" is found in fpgamgr logs for 4x10G or 4x25G port groups -- LACP links go down randomly

Impact

Interfaces are intermittently marked DOWN and then UP. Traffic is disrupted while the interface is marked DOWN.

Conditions

-- VELOS system -- Port groups configured in 4x10GB or 4x25GB mode. -- One or more interfaces on the blade are disabled.

Workaround

Enable all physical interfaces on the blade, even interfaces that may be unplugged or unused.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips