​​Introduction to UCSInstall_UCOS_15.0.1.11901-2.sha512.iso​​

This bootable ISO image provides the core operating system for Cisco Unified Computing System (UCS) platforms, delivering essential infrastructure for deploying Cisco Collaboration solutions like Unified Communications Manager (CUCM) 15.0.1. Released in Q1 2025 under Cisco’s quarterly software maintenance cycle, the .sha512 extension ensures cryptographic integrity through FIPS 140-3-compliant hashing.

Designed for bare-metal installations on UCS B-Series blade servers and C-Series rack servers, it supports:

  • ​​Red Hat Enterprise Linux 8.10+​​ base OS with Cisco-optimized kernel modules
  • ​​PostgreSQL 15.5/Oracle 21c​​ database engine preconfigurations
  • ​​Unified Communications Manager 15.0.1​​ cluster deployments

​​Key Features and Technical Enhancements​​

  1. ​​Security Framework​​

    • Resolves CVE-2025-3190 (CVSS 7.1) – kernel-level privilege escalation vulnerability
    • Implements TLS 1.3 encryption for inter-node communication in CUCM clusters

  2. ​​Performance Optimization​​

    • Reduces service initialization time by 40% through parallel resource loading
    • Adds support for NVIDIA ConnectX-7 SmartNIC acceleration in virtualized environments

  3. ​​Compatibility Enhancements​​

    • Validates UCS B200 M5 blade servers with 3rd Gen Intel Xeon Scalable processors
    • Supports Cisco HyperFlex 4.2 storage integrations via VIC 1457 adapters

​​Compatibility and System Requirements​​

​​Component​​ ​​Supported Versions/Models​​
UCS Hardware B200 M5, C220 M5, S3260 Storage
Hypervisor ESXi 8.0U2+, KVM 6.0+
Storage Controller Cisco 12G SAS Modular Raid
Minimum RAM 64GB (256GB recommended)

​​Critical Notes​​:

  • Requires 85GB free disk space for full OS deployment
  • Incompatible with UCS M4 generation servers

​​Deployment Limitations​​

  1. ​​Functional Restrictions​​

    • No backward compatibility with CUCM 14.x configuration backups
    • Limited to 3-node clusters in evaluation mode

  2. ​​Operational Requirements​​

    • Mandatory firmware update to UCS C-Series Bundle 4.0(4d)
    • 45-minute maintenance window for production deployments

​​Secure Download and Licensing​​

Authenticated access is available at ​​https://www.ioshub.net/cisco-ucs-downloads​​. For compliance with Cisco licensing terms:

  1. ​​Entitlement Verification​​

    • Valid Cisco Service Contract (CSC) or Intersight Advantage License required
    • Partners must use Cisco Software Central with active SMART Net coverage

  2. ​​Integrity Validation​​
    Verify SHA-512 hash post-download using OpenSSL:

    bash复制
    openssl dgst -sha512 UCSInstall_UCOS_15.0.1.11901-2.sha512.iso  
    

    Match against Cisco’s published checksum:
    
e3b0c44298fc1c14... (64-byte hex string).

This article synthesizes technical specifications from Cisco UCS 15.0.1 release notes, HyperFlex integration guides, and bare-metal deployment best practices. Always verify hardware compatibility against Cisco’s official interoperability matrix before installation.

: Cisco UCS B-Series Server Installation Guide 2025
: Unified Communications Manager 15.0.1 Release Notes
: FIPS 140-3 Cryptographic Standards Compliance Report

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