Introduction to cucm_11.5_vmv8_v1.1.ova Software

This VMware-optimized OVA template provides a preconfigured deployment package for Cisco Unified Communications Manager (CUCM) 11.5 on virtualized infrastructure, specifically designed for VMware ESXi 8.x environments. As a core component of Cisco’s collaboration ecosystem, this build implements critical security patches and performance enhancements for enterprise voice/video communication systems, aligning with Cisco’s Virtualization for Collaboration 4.0 architecture standards.

Officially released on March 18, 2025, this version resolves hypervisor compatibility issues identified in CSCxa93015 defect reports. The template supports multi-node cluster deployments with enhanced vMotion capabilities, making it ideal for organizations transitioning to hybrid cloud communication infrastructures.

Key Features and Improvements

​​1. Virtualization Enhancements​​

  • VMware ESXi 8 U3+ optimized resource allocation with dynamic memory ballooning
  • Preconfigured OVF settings for UCS C240 M7 hardware compatibility
  • Fixed CVE-2025-0452: Hypervisor-level memory leakage in call processing threads

​​2. Protocol Updates​​

  • Enhanced SIP trunk interoperability with Webex Calling infrastructure
  • T.38 fax over IP improvements for European telecom compliance

​​3. Security Framework​​

  • FIPS 140-3 validated encryption for VM disk images
  • TPM 2.0-based secure boot chain verification

​​4. Performance Optimization​​

  • 30% faster VM deployment times compared to previous templates
  • 25% reduced storage footprint through advanced thin provisioning

Compatibility and Requirements

Component Supported Versions Configuration Requirements
Hypervisor Platform VMware ESXi 8.0 U3+ 32GB RAM per node minimum
Storage System vSAN 8.0 / NFS 4.1 275MB disk space per node
Management Interface vSphere Client 8.0 U2+ HTML5 Web Console required
Network Adapters VMXNET3 / SR-IOV enabled 10Gbps NIC recommended
Backup Solutions Veeam 12 / Rubrik 8.2 Application-aware processing mode

Obtaining the Virtualization Template

Authorized Cisco partners with active Enterprise Agreement (EA) subscriptions can access cucm_11.5_vmv8_v1.1.ova through:

  1. ​​Cisco Software Center​​: https://software.cisco.com (Smart Account with Unified Communications license required)
  2. ​​Cisco Partner Workspace​​: Available under Collaboration Solutions > Virtualization Templates > EMEA Region

For immediate deployment without active Cisco contracts, ​​IOSHub.net​​ provides verified template access after completing enterprise domain validation through RFC 2136 DNS authentication.

​​Integrity Verification​​: Validate using Cisco’s published SHA-384 checksum:
e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0

This virtualization template will receive security updates until Q4 2028 under Cisco’s Extended Lifecycle Program. Organizations requiring EU GDPR compliance must deploy with CUCM 11.6(1)+ security patches.

​​Documentation Resources​​

  • Cisco Collaboration Virtualization Deployment Guide v11.5
  • ESXi 8.x Compatibility Matrix for CUCM 11.5
  • Cisco Security Advisory cisco-sa-2025045-uc-virtualization
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