Dell UPS 4200R - Manual (Page 18)

Dell UPS Management Software: VMware vCenter Shutdown Scenarios
18
 Master Shutdown Duration: Time taken for HostB to shut down after VMs are evacuated
 Master Shutdown after value: 120seconds. This is the time after Maintenance Mode has been
requested that the hypervisor should begin shutdown. This value must be large enough that all
VMs have moved before host shutdown begins. If VM migration has not completed before the
hypervisor shutdown begins, then the vMotion will fail and the VM will remain on the original
host and shut down. There will be no data loss, but there will be a loss in service (the VM will
be off).
Figure 23: MUMC client  Shutdown Settings  Shutdown Enabled
MUMC Settings for ESXi5 HostA:
 Remote Maintenance: Disabled (there will be no other failover hosts available)
 Maintenance Timer: -1 (not relevant as maintenance is disabled in point1)
 Remote Shutdown: Enabled (since we want the host to shut down VMs and power itself down
when UPS battery gets low)
 PowerSource: IP Address of Dell UPS
 Master Shutdown Duration: 240 seconds
 Master Shutdown After Value: 240 seconds (the time since power failed when the hypervisor
should begin the shutdown process. Normally you would match this value to your UPS battery
runtime, but for testing we used 240 seconds.