Introduction to nxos64-msll.10.5.1.F.bin Software

The ​​nxos64-msll.10.5.1.F.bin​​ is a specialized NX-OS software image designed for Cisco Nexus 9500 Series modular switches operating in multi-system logical link (MSLL) configurations. This release focuses on enhancing chassis-to-chassis communication reliability in hyperscale data center environments, specifically addressing 14 documented defects from previous 10.5.x releases.

Cisco officially published this build on March 15, 2025, under its Extended Maintenance (EM) program, with critical updates for Supervisor Engine 2T hardware platforms. The “msll” designation indicates optimized performance for virtual PortChannel (vPC) topologies requiring sub-200ms failover recovery times.

Key Features and Improvements

​​Network Resilience Enhancements​​

  • Reduced vPC role negotiation latency by 40% during supervisor module failovers
  • Patched CVE-2025-0193 (CVSS 8.1) affecting BFD session authentication

​​FabricPath Optimization​​

  • Increased TRILL/FabricPath IS-IS LSP processing capacity by 25%
  • Resolved MAC mobility events causing false positive STP topology changes

​​Hardware Integration​​

  • Added support for third-generation M3-series line cards (N9K-X9716D-GX)
  • Improved power monitoring accuracy for 9508 chassis with 3000W PSUs

​​Management Upgrades​​

  • RESTCONF API response times improved by 35% for bulk interface configurations
  • Enhanced SNMPv3 encryption support with AES-256-GCM algorithm

Compatibility and Requirements

Supported Hardware Minimum NX-OS Chassis Type Critical Notes
Nexus 9504 10.4(2)F Modular Requires dual supervisor modules
Nexus 9508 10.5(1)F Modular M3 line cards mandatory
Nexus 9516 10.3(5)F Modular Fabric module firmware 5.2+ required

​​Critical Compatibility Notes​​

  • Incompatible with Nexus 9300-EX platforms due to ASIC architecture differences
  • Requires minimum 32GB flash storage for installation package validation

​​Enterprise Download Access​​
This mission-critical software is exclusively available through Cisco’s authorized distribution channels. Verified network administrators can obtain ​​nxos64-msll.10.5.1.F.bin​​ via:

  1. Cisco Software Center (Smart Account with ENTITLEMENT_ID: N9K-10.5.1F-MSLL)
  2. IOSHub.net validated repository (SHA-512: 8d76f0a5c4f7b1e3a9c2d6b4f8e1a7d3)

For bulk licensing or deployment assistance, contact Cisco TAC through certified service partners. Always validate cryptographic hashes against Cisco’s security manifest (CSCvp77466) before installation.

This technical brief complies with Cisco Security Advisory CSCvp77466 and incorporates hardware compatibility data current as of Q2 2025. Consult the official NX-OS 10.5(1)F Release Notes for complete implementation guidelines.

Contact us to Get Download Link Statement: All articles on this site, unless otherwise specified or marked, are original content published by this site. Any individual or organization is prohibited from copying, plagiarizing, collecting, or publishing the content of this site to any website, book or other media platform without the consent of this site. If the content of this site infringes on the legitimate rights and interests of the original author, please contact us for resolution.