UPS management card HP UPS (R5500) error on all hosts
I found out when installing the agent for a management card for theR5500 XR UPS from HP, with agents running on Hyver-V 2008 R2. There can be a situation that an a certain time all hosts in the management interface in the UPS management card (fw 2.1.11) are crossed red.
This issue comes forward when a host from the Hyver-V servers still does have it’s firewall turned on.
After disabling the firewall you won’t see this issue again.