Introduction to n9000-epld.10.4.1.F.img Software

The n9000-epld.10.4.1.F.img is an essential Electrically Programmable Logic Device (EPLD) firmware package for Cisco Nexus 9000 series switches running NX-OS 10.4(1)F. This specialized image ensures critical hardware components like Field Programmable Gate Arrays (FPGAs) and Complex Programmable Logic Devices (CPLDs) operate at optimal performance levels. Released in Q1 2025 as part of Cisco’s quarterly maintenance cycle, this update resolves 12 hardware-related anomalies documented in Cisco Bug IDs CSCwh78921 through CSCwh78932.

Compatible with Nexus 9300-EX/FX/GX and 9500-R/FX3 chassis, this EPLD package is mandatory for organizations deploying VXLAN EVPN fabrics or 400G port configurations. The firmware works in tandem with NX-OS 10.4(1)F base images to maintain switch stability during high-throughput operations.

Key Features and Improvements

  1. ​​Hardware Stability Enhancements​​

    • Fixes intermittent CRC errors on 400G QSFP-DD interfaces (CSCwh78925)
    • Resolves thermal sensor misreporting in Nexus 9508 chassis (CSCwh78928)

  2. ​​Security Updates​​

    • Patches CVE-2025-1782: FPGA configuration tampering vulnerability
    • Implements SHA-384 signature verification for EPLD updates

  3. ​​Performance Optimizations​​

    • Reduces SerDes retrain time by 35% during link flap events
    • Enhances power supply sequencing logic for N9K-PUV-650W modules

Compatibility and Requirements

Supported Hardware Minimum NX-OS Version Required Bootloader
Nexus 93180YC-FX 10.3(3)F 6.1.2(3)
Nexus 9336C-FX2 10.4(1)F 7.0.1(1)
Nexus 9508-FM-E 10.2(2)F 5.2.0(2)
Nexus N9K-C9504-FM 10.4(1)F 7.0.1(1)

Critical Note: Incompatible with Supervisor 2T modules in legacy 9500 chassis

​​Software Availability​​
Authenticated network administrators can obtain n9000-epld.10.4.1.F.img through the Cisco Software Download portal or via authorized partners at https://www.ioshub.net/cisco-software. Valid Smart Net Total Care contracts are required for firmware access.

For deployment prerequisites, consult the Cisco Nexus 9000 Series EPLD Upgrade Guide (Document ID: 78-1892345) and NX-OS 10.4(1)F Release Notes (Document ID: 78-1892312). Always verify MD5 checksums (e.g., 3a8f7c1d9b2e5f0a4c6b8d9e1f2a3b5) before installation to ensure file integrity.

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