Bug ID 423745: vCMP guest may detect another vCMP guest's backplane broadcast traffic

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP vCMP(all modules)

Known Affected Versions:
11.4.0

Fixed In:
11.4.1

Opened: Jun 21, 2013
Severity: 3-Major
Related AskF5 Article:
K15844

Symptoms

vCMP guest may detect another vCMP guest's backplane broadcast traffic. The issue is visible by checking log messages in /var/log/ltm.

Impact

Traffic processing is unaffected, and the condition noted in the warning is not harmful. Log messages similar to the following appear in /var/log/ltm: 'warning tmm[21435]: 01190004:4: address conflict detected for 127.20.1.1 (02:01:23:45:00:18) on VLAN 4095'. These messages might be seen in the vCMP guest--they do not appear on the vCMP hypervisor.

Conditions

This issue only affects vCMP guests running on VIPRION B4300, B4340, and B4350 blades with a version 11.4.0 hypervisor, when one of the vCMP guests is assigned interface 0.39.

Workaround

Redeploy the vCMP guest that is using interface 0.39 to a different blade or to a different set of interfaces.

Fix Information

vCMP guests no longer process broadcast traffic from another guest and the log messages relating to address conflicts no longer appear.

Behavior Change