Hi there,
Have you checked through the HP Virtual Connect logs to see if there were any related entries at the time of the reboot? Also what's the status of the Server Ports for this host in the Interconnect Bays on the Virtual Connect?
vM
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VCAP-DCD / VCAP-DCA / VCP-CLOUD / VCP-DT / VCP5 / VCP4
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vMustard.com