Bug ID 611487: vCMP: VLAN failsafe does not trigger on guest

Last Modified: Mar 17, 2021

Bug Tracker

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

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2

Fixed In:
13.0.0, 12.1.2 HF1

Opened: Aug 17, 2016
Severity: 3-Major


vCMP: VLAN failsafe does not trigger on guest due to IPv6 link-local neighbor discovery traffic from host.


Since the heartbeat messages going over IPv6 link-local addresses continue to be successfully passed from host to guest, VLAN failsafe does not trigger if a downstream router or switch goes down that's connected to the VLAN.


vCMP host configured, VLAN failsafe enabled on a VLAN, one or more VCMP guests enabled that use that VLAN


If you are able to, disabling IPv6 on the host will allow VLAN failsafe to work as expected.

Fix Information


Behavior Change