First Published: September 2, 2025

Cisco UCS C-Series Servers

Cisco UCS C-Series Servers deliver unified computing in an industry-standard form factor to reduce total cost of ownership and increase agility. Each product addresses varying workload challenges through a balance of processing, memory, I/O, and internal storage resources.

About the Release Notes

This document describes the new features, system requirements, open caveats and known behaviors for C-Series software release 6.0(1) including Cisco Integrated Management Controller (Cisco IMC) software and any related BIOS, firmware, or drivers. Use this document in conjunction with the documents listed in the Related Documentation section.


Note

We sometimes update the documentation after original publication. Therefore, you should also refer to the documentation on Cisco.com for any updates.

Revision History

Revision

Date

Description

A0

September 02, 2025

Created release notes for 6.0(1.250130) for the following servers:

  • Cisco UCS C245 M8 servers

The firmware files in Cisco Host Upgrade Utility for individual releases are available at: Cisco UCS C-Series Integrated Management Controller Firmware Files, Release 6.0

Created release notes for 6.0(1.250127) for the following servers:

  • Cisco UCS C220 M8, C225 M8 and C240 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers

The firmware files in Cisco Host Upgrade Utility for individual releases are available at: Cisco UCS C-Series Integrated Management Controller Firmware Files, Release 6.0

Cisco IMC Release Number and .ISO Image Names

Beginning with the release 4.3, Cisco is updating the release number naming convention to align with the .ISO images.

Example: 4.3.1.YYXXXX

  • 4.3—Represents the main release.

  • .1—Represents the first release.

    For the current 4.3 main release, .1 represents the first release number.

    For subsequent maintenance releases, this number will represent the related maintenance release number.

  • YY—Represents the year of release.

    For the current 4.3 main release, 23 is derived from the year 2023.

  • XXXX—The final 4 digits represent the increasing sequence of build numbers every year.

    For the first 4.3 main release, the number is 0097.

Supported Platforms and Release Compatibility Matrix

Supported Platforms in this Release

The following servers are supported in this release:

  • Cisco UCS C220 M8

  • Cisco UCS C240 M8

  • Cisco UCS C225 M8

  • Cisco UCS C245 M8

  • Cisco UCS C220 M7

  • Cisco UCS C240 M7

  • Cisco UCS C220 M6

  • Cisco UCS C240 M6

  • Cisco UCS C245 M6

  • Cisco UCS C225 M6

For information about these servers, see Overview of Servers.

Cisco IMC and Cisco UCS Manager Release Compatibility Matrix

Firmware Version Equivalency Between Cisco Intersight, Cisco IMC, and Cisco UCS Manager

For more information, see Cisco UCS Equivalency Matrix for Cisco Intersight, Cisco IMC, and Cisco UCS Manager.

Cisco IMC and Cisco UCS Manager Release Compatibility Matrix

Cisco UCS C-Series Rack-Mount Servers are managed by built-in standalone software —Cisco IMC. However, when a Rack-Mount Server is integrated with Cisco UCS Manager, UCSM end-user interface is used to manage the server.

The following table lists the supported platforms, Cisco IMC releases, and Cisco UCS Manager releases for Rack-Mount Servers:

Table 1. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 6.0(1) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

6.0(1.250130)

6.0(1b)

  • Cisco UCS C245 M8 servers

6.0(1.250127)

  • Cisco UCS C220 M8, C225 M8 and C240 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers
Table 2. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.3(6) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.3(6.250060)

NA

  • Cisco UCS C245 M8 servers

4.3(6.250053)

4.3(6c)

  • Cisco UCS C220 M8, C225 M8, C240 M8 and C245 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers

  • Cisco UCS S3260 M5 servers

4.3(6.250044)

4.3(6b)

  • Cisco UCS C220 M8, C225 M8, C240 M8 and C245 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

4.3(6.250039)

4.3(6a)

  • Cisco UCS C220 M8 and C240 M8 servers

  • Cisco UCS S3260 M5 servers

4.3(6.250040)

  • Cisco UCS C225 M8 and C245 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers
Table 3. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.3(5) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.3(5.250045)

NA

  • Cisco UCS C225 M8 servers

4.3(5.250043)

NA

  • Cisco UCS C225 M8 and C245 M8 servers

4.3(5.250033)

NA

  • Cisco UCS C225 M8 and C245 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6, C245 M6 servers and S3260 M5 servers

4.3(5.250030)

4.3(5d)

  • Cisco UCS C225 M8 and C245 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6, C245 M6 servers and S3260 M5 servers

4.3(5.250001)

4.3(5c)

  • Cisco UCS C225 M8 and C245 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6, C245 M6 servers and S3260 M5 servers

4.3(5.240021)​

4.3(5a)

  • Cisco UCS C225 M8 and C245 M8 servers

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6, C245 M6 servers and S3260 M5 servers
Table 4. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.3(4) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

  • 4.3(4.252002)

  • 4.3(4.252001)

NA

  • 4.3(4.252002) - Cisco UCS C225 M6 servers

  • 4.3(4.252001) - Cisco UCS C220 M6, C240 M6 servers

4.3(4.242066)

4.3(4f)

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 and S3260 M5 servers

4.3(4.242038)

NA

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 and S3260 M5 servers

4.3(4.242028)

NA

  • Cisco UCS C220 M7 and C240 M7 servers

4.3(4.241063)

4.3(4b)

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 and S3260 M5 servers

4.3(4.241014)

4.3(4b)

Cisco UCS C245 M8 server

4.3(4.240152)

4.3(4a)

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 and S3260 M5 servers
Table 5. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.3(3) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.3(3.240043)

NA

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers

4.3(3.240041)​

NA

  • Cisco UCS S3260 M5 servers

4.3(3.240022)

4.3(3a)

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 and S3260 M5 servers
Table 6. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.3(2) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.3(2.250045)

NA

Cisco UCS C220 M5, C240 M5, C480 M5 and C125 M5 servers

4.3(2.250037)

4.3(6c)

Cisco UCS C220 M5, C240 M5, C480 M5 servers

4.3(2.250022)

NA

Cisco UCS C125 M5 servers

4.3(2.250021)

NA

Cisco UCS C240 M5 servers

4.3(2.250016)

NA

Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers

4.3(2.240107)

NA

Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers

4.3(2.240090)

NA

Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers

4.3(2.240077)

NA

Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers

4.3(2.240053)

NA

Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers

4.3(2.240037)

NA

  • Cisco UCS C225 M6 and C245 M6 servers

4.3(2.240009)

NA

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers

  • Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers

4.3(2.240002)

4.3(2)

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers

  • Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers

4.3(2.230270)

4.3(2)

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers

  • Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers

4.3(2.230207)

4.3(2)

  • Cisco UCS C220 M7 and C240 M7 servers

  • Cisco UCS C220 M6, C240 M6, C225 M6 and C245 M6 servers

  • Cisco UCS C220 M5, C240 M5, C480 M5, C125 M5 and S3260 M5 servers
Table 7. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.3(1) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.3(1.230138)

No Support

Cisco UCS C220 M7 and C240 M7 servers

4.3(1.230124​)

No Support

Cisco UCS C220 M7 and C240 M7 servers

4.3(1.230097)

No Support

Cisco UCS C220 M7 and C240 M7 servers
Table 8. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.2(3) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.2(3o)

4.2(3n)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3n)

4.2(3m)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3m)

4.2(3l)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3l)

4.2(3k)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3k)

NA

Cisco UCS S3260 M5 servers

4.2(3j)

4.2(3j)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3i)

4.2(3i)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3g)

4.2(3g)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3e)

4.2(3e)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3d)

4.2(3d)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(3b)

4.2(3b)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers
Table 9. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.2(2) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.2(2g)

4.2(2d)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(2f)

4.2(2c)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.2(2a)

4.2(2a)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

Cisco UCS C220 M5, C240 M5, C240 SD M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers
Table 10. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.2(1) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.2(1j)

4.2(1n)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

4.2(1i)

4.2(1m)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

4.2(1g)

No Support

Cisco UCS C225 M6 and C245 M6 servers

4.2(1f)

4.2(1k)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

4.2(1e)

4.2(1i)

Cisco UCS C220 M6, C225 M6, C240 M6, and C245 M6 servers

4.2(1c)

No Support

Cisco UCS C225 M6 and C245 M6 servers

4.2(1b)

4.2(1f)

Cisco UCS C220 M6 and C240 M6 servers

4.2(1a)

4.2(1d)

Cisco UCS C220 M6, C240 M6, and C245 M6 servers

Note

 

Cisco UCS Manager does not support Cisco UCS C245 M6 servers.
Table 11. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.1(3) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.1(3n)

NA

Cisco UCS C220 M5, C240 M5, C480 M5, S3260 M5 and S3260 M4 servers

4.1(3m)

4.1(3m)

Cisco UCS C220 M5, C240 M5, C480 M5, S3260 M5 and S3260 M4 servers

4.1(3l)

4.1(3k)

Cisco UCS C480 M5, C220 M5, C240 M5 servers

4.1(3i)

4.1(3j)

Cisco UCS C220 M5, C240 M5, C480 M5, S3260 M4, S3260 M5, C125 M5 servers

4.1(3h)

4.1(3i)

Cisco UCS C220 M5, C240 M5, C480 M5, S3260 M4, S3260 M5, C125 M5 servers

4.1(3g)

No Support

Cisco UCS S3260 M4 and S3260 M5 servers

4.1(3f)

4.1(3h)

Cisco UCS C220 M5, C240 M5, C480 M5, S3260 M4, S3260 M4, S3260 M5, and C125 M5 servers

4.1(3d)

4.1(3e)

Cisco UCS C220 M5, C240 SD M5, C240 M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5, and C125 M5 servers

4.1(3c)

4.1(3d)

Cisco UCS C220 M5, C240 SD M5, C240 M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5 and C125 M5 servers

4.1(3b)

4.1(3a)

Cisco UCS C220 M5, C240 SD M5, C240 M5, C480 M5, C480 ML M5, S3260 M4, S3260 M5 and C125 M5 servers

Table 12. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.1(2) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.1(2m)

No Support

Cisco UCS C220 M4, C240 M4 and C460 M4 servers.

4.1(2l)

No Support

Cisco UCS C220 M4 and C240 M4 servers.

4.1(2k)

No Support

Cisco UCS C220 M4, C240 M4, and C460 M4 servers

4.1(2j)

No Support

Cisco UCS C220 M4, C240 M4, and C460 M4 servers

4.1(2h)

No Support

Cisco UCS C220 M4, C240 M4, and C460 M4 servers

4.1(2g)

No Support

Cisco UCS C220 M4, C240 M4, and C460 M4 servers

4.1(2f)

4.1(2c)

Cisco UCS C220 M5, C240 SD M5, C240 M5, C480 M5, C480 ML M5, S3260 M5, C220 M4, C240 M4, C460 M4, and S3260 M4 servers

4.1(2e)

No Support

Cisco UCS C125 M5 servers

4.1(2d)

No Support

Cisco UCS C240 M5 and C240 SD M5 servers

4.1(2b)

4.1(2b)

Cisco UCS C220 M5, C240 SD M5, C240 M5, C480 M5, C480 ML M5, S3260 M5, C125 M5, C220 M4, C240 M4, C460 M4, and S3260 M4 servers

4.1(2a)

4.1(2a)

Cisco UCS C220 M5, C240 SD M5, C240 M5, C480 M5, C480 ML M5, S3260 M5, C125 M5, C220 M4, C240 M4, C460 M4, and S3260 M4 servers

Table 13. Cisco IMC and UCS Manager Software Releases for Rack Mount Servers for Cisco IMC 4.1(1) Release

Cisco IMC Release

Cisco UCS Manager Release

Rack Mount Servers

4.1(1h)

4.1(1e)

Cisco UCS C220 M5, C240 M5, C480 M5, C480 ML M5, S3260 M5, C125 M5, C220 M4, C240 M4, C460 M4, and S3260 M4 servers

4.1(1g)

4.1(1d)

Cisco UCS C220 M5, C240 M5, C480 M5, C480 ML M5, S3260 M5, C125 M5, C220 M4, C240 M4, C460 M4, and S3260 M4 servers

4.1(1f)

4.1(1c)

Cisco UCS C220 M5, C240 M5, C480 M5, C480 ML M5, S3260 M5, C125 M5, C220 M4, C240 M4, C460 M4, and S3260 M4 servers

4.1(1d)

4.1(1b)

Cisco UCS C220 M5, C240 M5, C480 M5, and C480 ML M5 servers

4.1(1c)

4.1(1a)

Cisco UCS C220 M5, C240 M5, C480 M5, C480 ML M5, S3260 M5, C125 M5, C220 M4, C240 M4, C460 M4, and S3260 M4 servers

Operating System and Browser Requirements

For detailed information about supported Operating System, see the interactive UCS Hardware and Software Compatibility matrix.

Cisco recommends the following browsers for Cisco UCS Rack Server Software, Release 6.0(1):

Recommended Browser

Minimum Recommended Browser Version

Minimum Recommended Operating System
Google Chrome

Version 138.0.7204.169 (Official Build) (arm64)

Mac OS 15.5
Version 138.0.7204.169 (Official Build) (64-bit) Microsoft Windows 11 Enterprise
Version 138.0.7204.158 Microsoft Windows 11 Enterprise
Safari 18.5 (20621.2.5.11.8)

Mac OS 15.5
Mozilla Firefox

140.0.4 (aarch64)
Version 140.0.4

Microsoft Windows 11 Enterprise
Microsoft Edge

Version 138.0.3351.109 (Official build) (64-bit)

Version 138.0.3351.95 (Official build) (64-bit

Note

If the management client is launched using an unsupported browser, check the help information from the For best results use supported browsers option available in the login window for the supported browser versions.

Transport Layer Security (TLS) version 1.2.

Default Ports

Following is a list of server ports and their default port numbers:

Table 14. Server Ports

Port Name

Port Number

LDAP Port 1

389

LDAP Port 2

389

LDAP Port 3

389

LDAP Port 4

3268

LDAP Port 5

3268

LDAP Port 6

3268

SSH Port

22

HTTP Port

80

HTTPS Port

443

SMTP Port

25

KVM Port

2068

Intersight Management Port

8889

Intersight Cloud Port

8888

SOL SSH Port

2400

SNMP Port

161

SNMP Traps

162

External Syslog

514

Firmware Files

Firmware Files

The C-Series software release includes the following software files:

CCO Software Type File name(s) Comment
Unified Computing System (UCS) Server Firmware

For release specific ISO versions, see Cisco UCS C-Series Integrated Management Controller Firmware Files, Release 6.0.

Host Upgrade Utility
Unified Computing System (UCS) Drivers

ucs-cxxx-drivers.6.0(1.250130).iso

ucs-cxxx-drivers.6.0(1.250127).iso

Drivers
Unified Computing System (UCS) Utilities

ucs-cxxx-utils-efi.6.0(1.250130).iso

ucs-cxxx-utils-linux.6.0(1.250130).iso

ucs-cxxx-utils-vmware.6.0(1.250130).iso

ucs-cxxx-utils-windows.6.0(1.250130).iso

ucs-cxxx-utils-efi.6.0(1.250127).iso

ucs-cxxx-utils-linux.6.0(1.250127).iso

ucs-cxxx-utils-vmware.6.0(1.250127).iso

ucs-cxxx-utils-windows.6.0(1.250127).iso

Utilities

Note

Always upgrade the BIOS, the Cisco IMC and CMC from the HUU ISO. Do not upgrade individual components (only BIOS or only Cisco IMC), since this could lead to unexpected behavior. If you choose to upgrade BIOS, and the Cisco IMC individually and not from the HUU ISO, make sure to upgrade both Cisco IMC, and BIOS to the same container release.

If the BIOS and the Cisco IMC versions are from different container releases, it could result in unexpected behavior. Cisco recommends that you use the Update All option from the Host Upgrade Utility to update the firmware versions of Cisco IMC, BIOS, and all other server components (VIC, RAID Controllers, PCI devices, and LOM) together.

Host Upgrade Utility

The Cisco Host Upgrade Utility (HUU) is a tool that upgrades the Cisco UCS C-Series firmware.

The image file for the firmware is embedded in the ISO. The utility displays a menu that allows you to choose which firmware components to upgrade. For more information on this utility, see http://www.cisco.com/en/US/products/ps10493/products_user_guide_list.html.

For details of firmware files in Cisco Host Upgrade Utility for individual releases, see Cisco UCS C-Series Integrated Management Controller Firmware Files, Release 6.0.

Updating the Firmware

Use the Host Upgrade Utility to upgrade the C-Series firmware. Host Upgrade Utility can upgrade the following software components:

  • BIOS

  • Cisco IMC

  • CMC

  • Cisco VIC Adapters

  • LSI Adapters

  • LAN on Motherboard

  • PCIe adapter firmware

  • HDD firmware

  • SAS Expander firmware

  • DCPMM Memory

  • PCI Gen5 retimer

All firmware should be upgraded together to ensure proper operation of your server.


Note

We recommend that you use the select all and Update or Update & Activate All option from the Host Upgrade Utility to update the firmware versions of Cisco IMC, BIOS and all other server components (VIC, RAID Controllers, PCI devices, and LOM) together. Click Exit once you deploy the firmware.

For more information on how to upgrade the firmware using the utility, see:

http://www.cisco.com/c/en/us/support/servers-unified-computing/ucs-c-series-rack-servers/products-user-guide-list.html

Software Utilities

The following standard utilities are available:

  • Host Update Utility (HUU)

  • BIOS and Cisco IMC Firmware Update utilities

  • Server Configuration Utility (SCU)

  • Server Diagnostic Utility (SDU)

The utilities features are as follows:

  • Availability of HUU, SCU on the USB as bootable images. The USB also contains driver ISO, and can be accessed from the host operating system.

New Software in Release 6.0

New Software Features in Release 6.0(1.250127)

The following new software features are supported in Release 6.0(1.250127).

  • iSCSI UEFI boot support using Internet Protocol version 6 (IPv6) for Cisco UCS servers, enabling seamless integration into IPv6-capable IP networks. This addresses IPv4 limitations and offers improved scalability and management for next-generation infrastructure deployments.

  • Support for KVM direct access over inband on Cisco UCS C-Series M8, M7, M6, and M5 servers, enabling administrators to securely access and manage server consoles directly over the inband network and improving operational efficiency and flexibility for Cisco UCS C-Series servers.

  • On Cisco UCS M8 servers, Cisco IMC allows you to manage the SSD slot locator LED for individual drives through the Redfish API interface.

Resolved Caveats

Resolved Caveats in Release 6.0(1.250127)

The following defects were resolved in Release 6.0(1.250127):

Defect ID

Symptom

First Release Affected

Resolved in Release

CSCwn99720

On Cisco UCS C-Series M8 servers with Intel processors and an R1S CPU configured in a single-CPU setup on the 2-socket platform, Intel SGX remains disabled even after being enabled in the BIOS.

This issue does not occur with a dual CPU configuration.

This issue is resolved.

4.3(6.250039)

  • 6.0(1.250130)

  • 6.0(1.250127)

Open Caveats

Open Caveats in Release 6.0(1.250127)

The following defects are open in Release 6.0(1.250127):

Defect ID

Symptom

Workaround

First Affected Release

CSCwq61388

On Cisco UCS C-Series M6 servers running Cisco IMC 4.3.5 or later, enabling VMD in BIOS with multiple NVME drives can cause storage subsystem initialization to exceed 15 minutes, leading to Intersight Server Profile deployment failures. Disabling VMD or reducing the number of drives can resolve the issue. Earlier firmware versions may not be affected.

If VMD is not needed, then disable VMD.

If disabling VMD is not feasible, then use the minimum number of NVME drives for setup, as more drives slow down system startup.

4.3(5.250001)

CSCwm33093

On Microchip-based storage cards, the Virtual Drive (VD) shows as "Inoperable" even when all disks are online because the firmware automatically changes drive assignments to optimize performance, ignoring user settings from management tools.

Use arcconf output to check drive assignments in spans.

Firmware may override management tool settings for better performance.

 6.0(1.250127)

Known Behaviour and Limitations

Known Behaviors and Limitations in Release 6.0(1.250127)

The following caveats are known limitations in release 6.0(1.250127):

Defect ID

Symptom

Workaround

First Affected Release

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, particularly when BIOS update operations are disrupted:

  • Interrupting a BIOS flash or update (For example: forcing a power cycle during update)

  • Initiating a CMOS clear operation during a BIOS update

  • Restoring factory defaults during BIOS update

  • Rebooting Cisco IMC during a BIOS update

  • Performing other unexpected operations that disrupt the BIOS update process

Do one of these:

  • Reboot Cisco IMC.

  • Activate the Backup BIOS.

  • Re-flash or update the BIOS using the latest supported firmware, and activate it.

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 UCS Update 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.

4.3(3.240043)

CSCwk83741

When the controller claims the Micron SED drivers for encryption, PSID revert is required to perform any data sanitization on them.

This must be performed also to ensure that all the security ranges are cleared inside the drive.

PSID revert is required to perform any data sanitization on the SED drivers.

4.3(4.241063)

Related Documentation

For configuration information for this release, refer to the following:

For information about installation of the C-Series servers, refer to the following:

The following related documentation is available for the Cisco Unified Computing System:

Refer to the release notes for Cisco UCS Manager software and the Cisco UCS C Series Server Integration with Cisco UCS Manager Guide at the following locations: