On systems running Oracle Solaris 11.3 SRU 23 and SRU 24, the host cannot automatically power cycle as required by some firmware updates.
Workaround
If a power cycle is required for a firmware update, you must manually power cycle the host to complete the update. For more information, refer to 26613165 in "fwupdate Known Issues" in the Oracle Hardware Management Pack for Oracle Solaris 11.3 Release Notes at: http://docs.oracle.com/cd/E64576_01/index.html.