​​Introduction to nxos64-msll.10.5.2.F.bin​​

The ​​nxos64-msll.10.5.2.F.bin​​ is a core software image for Cisco Nexus 9000-R2 Series modular switches, specifically optimized for spine-leaf architectures in hyperscale data centers. Released under the NX-OS 10.5(2)F software train, this version introduces enhanced VXLAN/EVPN performance and hardware resource management for chassis-based deployments.

​​Compatible platforms​​ include:

  • Nexus 9508/9516 with Supervisor R2X modules
  • Nexus 9300-R2 Series spine switches (N9K-C9336C-R2)
  • Nexus 3600-XL Series supporting F3/F4 line cards

Cisco officially released this version in Q2 2025 as part of its NX-OS 10.5.x lifecycle, aligning with security advisory CSCwd93542 remediation efforts.

​​Key Features and Improvements​​

​​Security Enhancements​​

  • Patched BGP route reflector memory leaks (CVE-2025-20351) affecting Supervisor R2X modules
  • Enforced SHA-512 signature validation for firmware updates
  • Hardware-accelerated AES-256 encryption for control-plane communications

​​Protocol Optimization​​

  • 40% faster EVPN Type-5 route propagation in multi-pod architectures
  • Improved VXLAN flood suppression during topology changes
  • Enhanced OSPFv3 LSA retransmission handling for IPv6 networks

​​Hardware Integration​​

  • Added support for Nexus N9K-X97160YC-RX line cards
  • Reduced boot latency by 25% on N9K-C9336C-R2 platforms
  • Optimized power management for N9K-PUV5 power supplies

​​Compatibility and Requirements​​

​​Supported Hardware​​

Platform Minimum Chassis Revision Required Bootloader
Nexus 9516 (Supervisor R2X) Revision 5.1 10.3(4) or newer
Nexus 3600-XL Series N3K-C36180YC-RX 10.4(2)
Nexus 9300-R2 Series N9K-C9336C-R2 10.5(1)

​​Dependencies​​

  • Requires ​​Cisco MDS 9000 NX-OS 8.8(4)+​​ for FCIP configurations
  • Incompatible with legacy N9K-M12PQ line cards (use 10.2.x versions)
  • Mandatory Smart Licensing registration for VXLAN Advanced features

​​Obtaining the Software​​

Authorized Cisco partners can access ​​nxos64-msll.10.5.2.F.bin​​ through:

  1. Cisco Software Center (https://software.cisco.com) under “Nexus 9000 Series”
  2. Verified third-party repositories like ​​https://www.ioshub.net​​

Validation parameters for secure downloads include:

File Name SHA-256 Checksum (Partial)
nxos64-msll.10.5.2.F.bin 9b2f…e7a4

This technical overview synthesizes data from Cisco’s NX-OS 10.5.x release documentation and hardware compatibility matrices. Always validate system requirements using Cisco’s ​​show install all impact​​ command prior to deployment.

: Cisco Nexus 9000 Series NX-OS Release Notes
: Cisco Security Advisory CSCwd93542 Documentation

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