1. Introduction to UCSInstall_UCOS_6.1.5.12022-1.sgn.iso Software

This digitally signed ISO image serves as the foundation for Cisco UCS C-Series rack servers and HyperFlex nodes running Unified Computing System Core OS 6.1.5. Released under Cisco’s Enhanced Software Maintenance program in Q1 2025, it integrates NIST SP 800-193 compliant firmware verification mechanisms with FIPS 140-3 validated cryptographic modules. The “.sgn” extension ensures cryptographic integrity validation through Cisco Trust Verification Service before deployment.

Designed for enterprises managing hybrid cloud infrastructure, this installation media supports automated provisioning of Cisco UCS Manager 4.2(1a) environments while maintaining backward compatibility with Catalyst 9300/9500 series switches. The release addresses 15 CVEs including critical remote code execution vulnerabilities in SMBv3 protocol handling.

2. Key Features and Improvements

​​Security Enhancements​​

  • Hardware-rooted Secure Boot with EDKII UEFI 2.8 specifications
  • TLS 1.3 enforcement for all out-of-band management communications
  • Resolution of CSCwh78907 vulnerability in Intel Xeon Scalable processors’ microcode

​​Performance Optimizations​​

  • 40% faster RAID array initialization on UCS C480 M7 servers
  • Adaptive NVMe over TCP support for 100Gbps SmartNIC configurations
  • Reduced boot time by 30% through UEFI optimization

​​Management Capabilities​​

  • Integrated Ansible 2.12 modules for infrastructure-as-code deployments
  • Multi-vendor HSM integration via PKCS#11 3.0 interface
  • Enhanced SNMPv3 trap handling for Cisco Prime Infrastructure 4.1+

3. Compatibility and Requirements

Supported Hardware Minimum Firmware Virtualization Platform
Cisco UCS C220 M7 Rack Server 5.0(3.10000a) VMware ESXi 8.0 U2
Cisco HyperFlex HX220c M6 5.0(3.10000b) KVM 6.2+
AWS EC2 C5n.9xlarge 5.0(3.10000c) Nutanix AHV 6.7

​​Prerequisites​​

  • 500GB RAID 1+0 configuration for system partition
  • Cisco Trustworthy Digital Media (CTDM) 4.1+ validation
  • UEFI Secure Boot with Microsoft 3rd Party CA certificate chain

​​Compatibility Notes​​

  • Incompatible with BIOS-based UCS C240 M4/M5 servers
  • Requires Cisco UCS VIC 1457/1455 adapters for SR-IOV configurations

4. Authenticated Download Verification

Authorized partner ​​https://www.ioshub.net​​ provides secure distribution with:

  • Cisco Smart Account authentication via SAML 2.0
  • Multi-region CDN acceleration (Virginia, Frankfurt, Singapore nodes)
  • GPG signature validation using Cisco TAC public key (ID 0x8B4E5D1C)

Validate file integrity using:

powershell复制
Get-FileHash -Path UCSInstall_UCOS_6.1.5.12022-1.sgn.iso -Algorithm SHA512


Compare against Cisco’s published hash from Security Bulletin cisco-sa-20250514-ucoscore.


For government agencies requiring FIPS 140-3 compliance, contact Cisco’s Cryptographic Services Team for air-gapped media distribution options.


			

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