Overview

Overview

For each release, Cisco UCS C-Series and S-Series servers has a Host Upgrade Utility (HUU) ISO container which contains the Cisco IMC, BIOS and firmware for all the supported adapters. Using the HUU, you can update the firmware of the server components for each release. This document lists the firmware details for all 4.3 releases.

Additionally, this document also contains information on inter-dependencies between Cisco UCS hardware and the various versions of Cisco IMC. For instance, supported servers and adapters, and the corresponding recommended versions required for these components.

Revision History

The following table shows the online change history for this document:

Table 1. HUU Revision History Changes for 4.3 Releases

Release

Releases

Description

4.3(6)

The following 4.3(6) release was added:

  • Release 4.3.6.250060 — August 25, 2025

  • Release 4.3.6.250053 — July 7, 2025

  • Release 4.3.6.250044 — May 22, 2025

  • Release 4.3.6.250040 — April 30, 2025

  • Release 4.3.6.250039 — April 30, 2025

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C245 M8 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.6.250060.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

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

    • Cisco UCS C220 M7 and C240 M7 servers

    • S3260 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.6.250053.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

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

    • Cisco UCS C220 M7 and C240 M7 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.6.250044.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • 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

    For individual HUU versions, see section Firmware Files for Release 4.3.6.250040.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M8 and C240 M8 servers

    • S3260 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.6.250039.

4.3(5)

The following 4.3(5) release was added:

  • Release 4.3(5.250045) — August 29, 2025

  • Release 4.3(5.250043) — July 04, 2025

  • Release 4.3(5.250033) — May 20, 2025

  • Release 4.3(5.250030) — March 25, 2025

  • Release 4.3(5.250001) — January 16, 2025

  • Release 4.3(5.240021)​ — October 22, 2024

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C225 M8 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.5.250045.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C225 M8 and C245 M8 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.5.250043.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • 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 and S3260 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.5.250033.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • 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 and S3260 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.5.250030.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7 servers

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

    For individual HUU versions, see section Firmware Files for Release 4.3.5.250001.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7 servers

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

    For individual HUU versions, see section Firmware Files for Release 4.3.5.240021.

4.3(4)

The following 4.3(4) release was added:

  • Release 4.3(4.252001) — August 07, 2025

  • Release 4.3(4.242066) — December 16, 2024

  • Release 4.3(4.242038) — September 24, 2024

  • Release 4.3(4.241063) — August 15, 2024

  • Release 4.3(4.242028) — August 14, 2024

  • Release 4.3(4.241014) — June 26, 2024

  • Release 4.3(4.240152) — June 5, 2024

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M6, C240 M6 servers

    For individual HUU versions, see section Firmware Files for Release 4.3(4.252001).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7 servers

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

    For individual HUU versions, see section Firmware Files for Release 4.3(4.242066).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7 servers

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

    For individual HUU versions, see section Firmware Files for Release 4.3.4.242038.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7 servers

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

    For individual HUU versions, see section Firmware Files for Release 4.3.4.241063.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.4.242028.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C245 M8 server

    For individual HUU versions, see section Firmware Files for Release 4.3.4.241014.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7 servers

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

    For individual HUU versions, see section Firmware Files for Release 4.3.4.240152.

4.3(3)

The following 4.3(3) release was added:

  • Release 4.3(3.240041)​ — April 16, 2024

  • Release 4.3(3.240022) — February 15, 2024

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS S3260 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3.3.240041.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 andC240 M7 servers

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

    For individual HUU versions, see section Firmware Files for Release 4.3.3.240002.

4.3(2)

The following 4.3(2) release was added:

  • Release 4.3(2.250045) — July 31, 2025

  • Release 4.3(2.250037) — July 7, 2025

  • Release 4.3(2.250022) — April 14, 2025

  • Release 4.3(2.250021) — March 18, 2025

  • Release 4.3(2.250016) — February 20, 2025

  • Release 4.3(2.240107) — December 09, 2024

  • Release 4.3(2.240077) — August 08, 2024

  • Release 4.3(2.240053) — May 30, 2024

  • Release 4.3(2.240037) — May 21, 2024

  • Release 4.3(2.240009) — March 05, 2024

  • Release 4.3(2.240002) — January 23, 2024

  • Release 4.3.2.230270 — November 14, 2023

  • Release 4.3.2.230207 — August 16, 2023

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220, C240 and C480 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3(2.250045).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220, C240 and C480 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3(2.250037).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C125 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3(2.250022).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C240 M5 servers

    For individual HUU versions, see section Firmware Files for Release 4.3(2.250021).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

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

    For individual HUU versions, see section Firmware Files for Release 4.3(2.250016).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

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

    For individual HUU versions, see section Firmware Files for Release 4.3(2.240107).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

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

    For individual HUU versions, see section Firmware Files for Release 4.3(2.240107).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

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

    For individual HUU versions, see section Firmware Files for Release 4.3(2.240077).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

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

    For individual HUU versions, see section Firmware Files for Release 4.3(2.240053).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • C225 M6 and C245 M6 servers

    For individual HUU versions, see section Firmware Files for Release 4.3(2.240037).

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following 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

    For individual HUU versions, see section Firmware Files for Release 4.3.2.240009.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 andC240 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

    For individual HUU versions, see section Firmware Files for Release 4.3.2.240002.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 andC240 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

    For individual HUU versions, see section Firmware Files for Release 4.3.2.230270.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 andC240 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

For individual HUU versions, see section Firmware Files for Release 4.3.2.230207.

4.3(1)

The following 4.3(1) release was added:

  • Release 4.3(1.230138) — June 5, 2023

  • Release ​4.3(1.230124) — April 4, 2023

  • Release 4.3.1.230097 — March 3, 2023

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7

    For individual HUU versions, see section Firmware Files for Release 4.3.1.230138.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7

    For individual HUU versions, see section Firmware Files for Release 4.3.1.230124.

  • Created firmware files (Host Upgrade Utility (HUU) versions) for the following servers:

    • Cisco UCS C220 M7 and C240 M7

    For individual HUU versions, see section Firmware Files for Release 4.3.1.230097.