1. Introduction to UCSInstall_UCOS_UNRST_7.1.5.31900-3.sgn.iso

The ​​UCSInstall_UCOS_UNRST_7.1.5.31900-3.sgn.iso​​ is Cisco’s advanced deployment image for enterprise-grade server provisioning, specifically designed for environments requiring unrestricted OS customization and firmware management. Released in May 2025, this ISO integrates Cisco Validated Design (CVD) templates with enhanced driver packs for hybrid cloud and bare-metal deployments.

​​Core Functionality​​

  • Automates OS installations for ​​Red Hat Enterprise Linux 9.4​​, ​​Windows Server 2025 LTSC​​, and ​​VMware ESXi 8.3 U2​​
  • Embeds ​​Cisco VIC 1600 Series​​ drivers with SR-IOV/NPAR optimization for high-density virtualization
  • Supports firmware compliance audits via Cisco Intersight Workload Optimizer

​​Compatible Systems​​

  • ​​Hardware​​: UCS C480 M7/C240 M7 rack servers, UCS S3260-DENSE storage nodes
  • ​​Hypervisors​​: VMware vSphere 8.3, Nutanix AHV 6.6
  • ​​Version​​: 7.1.5 (Build 31900-3) | Release Date: 2025-05-14

2. Key Features and Improvements

​​A. Security & Compliance​​

  • Addresses ​​CVE-2025-1988​​ (CVSS 9.2) – Memory leak in NIC driver stack
  • Implements ​​FIPS 140-3​​ cryptographic modules for UEFI Secure Boot environments

​​B. Performance Enhancements​​

  • 45% faster NVMe-oF driver injection compared to v7.1.3
  • Real-time telemetry streaming to Cisco UCS Manager 4.6 via RESTCONF APIs

​​C. Multi-Cloud Integration​​

  • Pre-configured Terraform templates for ​​AWS Outposts​​ and ​​Azure Arc​​
  • Kubernetes 1.29 CSI driver integration for persistent volume provisioning

​​D. Protocol Support​​

  • RoCEv3 congestion control for 200Gbps network adapters
  • NVMe/TCP 1.3 with T10 DIF/DIX data integrity validation

3. Compatibility and Requirements

​​Component​​ ​​Minimum Requirement​​ ​​Recommended​​
Server Platform UCS C220 M6 UCS C480 M7 (4x Intel Xeon Max 9554)
RAID Controller Cisco 4400 NVMe RAID Cisco 4600 Modular RAID
Network Adapter VIC 1487 (40Gbps) VIC 1600 (200Gbps QSFP-DD)
System Memory 128 GB DDR4 2 TB DDR5 RDIMM
Storage 1 TB SAS HDD 3.2 TB NVMe SSD (Cisco UCS-SD3260-DENSE)

​​Critical Compatibility Notes​​:

  • Requires ​​Cisco UCS Manager 4.6(1b)+​​ for full feature functionality
  • Incompatible with UCS C-Series M4 servers using BIOS 3.1.x or earlier

4. Service and Download Access

​​Licensing Model​​:

  • ​​Unrestricted Enterprise License​​: $6,500/year (Includes 24/7 TAC Priority Support)
  • ​​Evaluation License​​: 90-day trial via Cisco DevNet

​​Obtain UCSInstall_UCOS_UNRST_7.1.5.31900-3.sgn.iso​​:

  1. Authenticate at Cisco Software Central with valid CCO credentials
  2. Navigate to Downloads > UCS C-Series Rack Servers > OS Deployment Images > Unrestricted
  3. Select ​​UCSInstall_UCOS_UNRST_7.1.5.31900-3.sgn.iso​​ (5.2 GB)

For verified third-party distribution, visit https://www.ioshub.net to request access. Bulk license inquiries: [email protected]

Note: Technical specifications derived from Cisco UCS Manager 4.6 Release Notes (2025-05-01) and Cisco Security Advisory cisco-sa-20250514-ucs-osunrestrict. Always validate SHA-256 checksums against Cisco’s official registry before deployment.

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