Occasionally, when using the fwupdate command to update system firmware that includes an SP reset as part of the update process, the Host-to-ILOM interconnect might fail to come back online after the SP reset. Even though the firmware update might have successfully completed, you will not be able to confirm it from the host due to the Host-to-ILOM interconnect failure.

The following example output shows what you might see with this issue:

# fwupdate update all -x metadata.xml

The following components will be upgraded as shown:
==========================================================
ID        Priority Action     Status      Old Firmware Ver.   Proposed Ver.  
    New Firmware Ver.   System Reboot    
------------------------------------------------------------------------------
------------------------------------------
sp        1        Check FW   Success     9.5.4.c             9.7.1.c        
    N/A                 N/A              
Please set 'Credential' and enable 'Host Interconnect' - the LAN over USB
path to SP then try again.

Execution Summary
==========================================================
ID        Priority Action     Status      Old Firmware Ver.   Proposed Ver.  
    New Firmware Ver.   System Reboot    
------------------------------------------------------------------------------
------------------------------------------
sp        1        Update     Aborted     9.5.4.c             9.7.1.c        
    N/A                 N/A              
ERROR: Cannot connect to BMC

Note that running the ilomconfig list interconnect command at this point might show the interconnect status as 'enabled', even though the connection is lost.

Workaround

If you encounter this issue, disable and then re-enable the Host-to-ILOM interconnect using the ilomconfig command. For example:

# ilomconfig disable interconnect
Host-to-ILOM interconnect disabled.
Set 'state' to 'disabled'

# ilomconfig enable interconnect
Set 'state' to 'enabled'
Host-to-ILOM interconnect successfully configured.

This should reset the interconnect and allow you to check to see if the new firmware is installed. For example:

# fwupdate list sysfw -v
==================================================
SP
==================================================
 ID: sp
     Product Name: SPARC T7-1
     ILOM Version: v3.2.6.2.c
     BIOS/OBP Version: 9.7.1.c
     XML Support: YES