Comment 1 for bug 1580648

The ip monitor detects changes to the IP address assignment on the HA device because that address is configured as a VIP in keepalived. Whenever keepalived executes a state transition it configures or removes the IP address from the 'ha' device, the IP monitor picks that up, notifies the agent when updates the Neutron server.

I'm not aware of any bugs of false positives or out of sync issues between the IP monitor and the actual state of keepalived.

This indicates an issue with the test, not the production code.