Bug ID 1037673: Vcc-lacpd on a system controller can crash and leave a core file while restarting

Last Modified: Dec 07, 2023

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

Known Affected Versions:
F5OS-C 1.1.4, F5OS-C 1.2.1

Fixed In:
F5OS-C 1.3.0, F5OS-C 1.2.2

Opened: Jul 30, 2021

Severity: 3-Major


Vcc-lacpd on a system controller crashes, leaving behind a core file and a system log indicating a crash occurred. After the crash, the daemon recovers within a few seconds.


The internal mgmt network to all blades may go down for a few seconds. Traffic running on tenants will be unaffected.


The crash only occurs during a restart of vcc-lacpd. Most commonly, a restart will occur during a system controller software update, using the "go-standby" command, or from a fatal error.


Limit failover scenarios on the system controllers, such as use of the system controller "go-standby" command or system controller software updates.

Fix Information

Vcc-lacpd no longer leaves a core file under these conditions.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips