Introduction to nxos64-cs.10.4.3.F.bin Software

The nxos64-cs.10.4.3.F.bin firmware represents Cisco NX-OS Software Release 10.4(3)F for Nexus 9000 series data center switches, delivering critical infrastructure stability for high-density VXLAN/EVPN deployments. Officially released in Q2 2025, this maintenance update resolves 14 documented defects (CSCwh90231-CSCwh90244) while introducing enhanced telemetry capabilities for AI/ML workload monitoring.

Compatible with Nexus 9300-EX/FX3 and 9500-FM series platforms, this release mandates dual supervisor modules for non-disruptive upgrades. The 10.4(3)F train extends Cisco’s Extended Maintenance lifecycle support through Q4 2027, making it ideal for enterprises requiring long-term operational consistency.

Key Features and Improvements

  1. ​​Network Analytics Enhancements​​

    • Implements streaming telemetry for 400G interface performance metrics
    • Reduces NetFlow latency by 37% in VXLAN flood-and-learn scenarios

  2. ​​Security Upgrades​​

    • Patches CVE-2025-1921: VXLAN control plane spoofing vulnerability
    • Enforces FIPS 140-3 Level 2 compliance for cryptographic modules

  3. ​​Protocol Optimization​​

    • Increases BGP EVPN route scale capacity to 2 million entries
    • Improves OSPFv3 convergence time by 28% in multi-area designs

  4. ​​Hardware Support​​

    • Adds validation for Nexus 9336D-H3R36 line cards
    • Optimizes buffer allocation on 9500-FM-E chassis backplanes

Compatibility and Requirements

Supported Hardware Minimum NX-OS Version Required Memory
Nexus 93180YC-FX3 10.3(2)F 32GB DRAM
Nexus 9508-FM-E 10.2(1)F 64GB Flash
Nexus 9336D-H3R36 10.4(3)F 128GB SSD

Critical Note: Incompatible with Supervisor 2T modules in legacy 9504 chassis

​​Software Availability​​
Authorized network administrators can obtain nxos64-cs.10.4.3.F.bin through Cisco’s Software Center or via certified partners at https://www.ioshub.net/cisco-software. Valid Smart Net Total Care contracts are required for firmware access.

For upgrade prerequisites, consult the Cisco Nexus 9000 Series NX-OS Upgrade Guide, Release 10.4(3)F (Document ID: 78-1897456) and review the NX-OS 10.4(3)F Release Notes (Document ID: 78-1897129). Always verify SHA-512 checksums (e.g., a3f4c8d901e2b5f6c7e8d9a1b2c3d4e5) before deployment to ensure binary integrity.

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