Known issues

Known issues in Cisco UCS C-Series M8, M7, and M6 6.0(1.250127) Server Firmware Release

This section provides a brief description of the limitations of the Server Firmware Releases. Click the bug ID to access the Cisco Bug Search Tool and see additional information.

Defect ID

Description

 Workaround

First Version Affected

CSCwn95239

On Cisco UCS C-Series servers, the server may fail to power on due to BIOS corruption. The following message is displayed: "Power on failure asserted [Power on Fail, Server failed to power-on]."

This issue can occur in the following scenarios, especially when BIOS update operations are disrupted:

  • Interrupting a BIOS flash or update (for example, forcing a power cycle during the update).

  • Initiating a CMOS clear operation during a BIOS update.

  • Restoring factory defaults during a BIOS update.

  • Rebooting Cisco IMC during a BIOS update.

  • Performing other unexpected operations that disrupt the BIOS update process.

Do one of these:

  • Reboot of CIMC. In-turn, recovery mechanism will start that is bios activation.

  • Activate of bacup BIOS.

  • Update and activate BIOS.

4.3(6.250039)

CSCwo68248

On Cisco UCS C220 M7 and C240 M7 servers running HUU 4.3(3.240xxx) level firmware with 2 PCIe VICs and 1 MLOM VIC, upgrading the server firmware to HUU 4.3(4.xxxxxx), 4.3(5.xxxxxx), 4.3(6.xxxxx), or later using the Redfish API interface may cause the UCSUpdate task to falsely report an update failure for the PCIe VIC (riser1) through which CiscoCard mode is configured. However, the firmware is actually updated and activated successfully in the background.

Note

 

In the mentioned HUU version numbers, "xxxx" represents all versions available within the series.

There is no workaround. Ignore the false failure update.

4.3(3.240043)