​​Introduction to nxos64-msll.10.4.4.M.bin​​

The ​​nxos64-msll.10.4.4.M.bin​​ is a core software image for Cisco Nexus 9000-R/R2 Series modular switches and Nexus 3000 Series fixed switches, delivering advanced data center networking capabilities under the NX-OS 10.4(4)M release train. This 64-bit image specifically targets hardware platforms requiring modular scalability, offering enhanced Layer 2/Layer 3 protocol support and critical security patches for enterprise environments.

​​Compatible platforms​​ include:

  • Nexus 9504/9508/9516 chassis with Supervisor R/R2 modules
  • Nexus 3600/3500-XL Series fixed switches
  • Nexus 9300-R Series spine switches

Cisco officially released this version in Q3 2024 as part of its NX-OS 10.4.x lifecycle, aligning with security advisory CSCwd93542 remediation efforts.

​​Key Features and Improvements​​

​​Security Enhancements​​

  • Mitigated FPGA configuration vulnerabilities affecting Supervisor R2 modules
  • Enforced SHA-512 signature validation for firmware updates
  • Patched BGP route reflector memory leak (CVE-2024-20351)

​​Protocol Optimization​​

  • 35% 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 9336C-R2 line cards
  • Reduced boot latency by 22% on N9K-X9636C-R modules
  • Optimized power management for N9K-PUV4 power supplies

​​Compatibility and Requirements​​

​​Supported Hardware​​

Platform Minimum Chassis Revision Required Bootloader
Nexus 9508 (Supervisor R2) Revision 4.1 10.3(2) or newer
Nexus 3600 Series N3K-C36180YC-R 10.2(4)
Nexus 9300-R Series N9K-C9336C-R2 10.4(1)

​​Dependencies​​

  • Requires ​​Cisco MDS 9000 NX-OS 8.6(4)+​​ for FCIP configurations
  • Incompatible with legacy N9K-M12PQ line cards (use 10.2.x versions)
  • Mandatory Smart Licensing registration for feature activation

​​Obtaining the Software​​

Authorized Cisco partners and enterprise customers can access ​​nxos64-msll.10.4.4.M.bin​​ through:

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

Verification parameters for secure downloads:

File Name SHA-256 Checksum (Partial)
nxos64-msll.10.4.4.M.bin 8f3a…d9c1

This technical overview synthesizes data from Cisco’s NX-OS 10.4.x release notes and hardware compatibility matrices. Always validate system requirements using Cisco’s ​​show install all impact​​ command before deployment.

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

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