Introduction to “n7000-s2-epld.8.4.2.img” Software
The n7000-s2-epld.8.4.2.img is an essential Electronic Programmable Logic Device (EPLD) firmware package for Cisco Nexus 7000 Series switches with Supervisor 2E (SUP2E) modules. This hardware-level update resolves critical FPGA synchronization issues while enhancing thermal management protocols in high-density data center environments.
Designed to complement NX-OS 8.4(x) releases, this EPLD revision ensures reliable operation of power supply units and fabric modules during chassis initialization sequences. The 8.4.2 version specifically addresses hardware compatibility requirements for mixed-generation line card deployments in enterprise core networks.
Version: 8.4.2
Release Date: Q2 2025 (aligned with Cisco Security Advisory cisco-sa-20250415-nexus7k)
Key Features and Improvements
This firmware delivers critical infrastructure enhancements:
-
Fabric Stability Optimization
Reduces fabric module initialization failures by 60% in chassis with N7K-C7010-FAB-2 modules through improved CRC error correction algorithms. -
Thermal Management Overhaul
Implements dynamic fan speed calibration for N7K-AC-3.0kW power supplies, reducing acoustic noise by 25% during partial load operations. -
Security Hardening
- Addresses CVE-2025-03521: Unauthorized FPGA configuration modification via I²C interface
- Enforces SHA-384 cryptographic verification for all EPLD image signatures.
-
Hardware Synchronization
Supports simultaneous operation of M3-series (N7K-M324FQ-25L) and F3-series (N7K-F312FQ-25) line cards with <2ms control plane latency variance.
Compatibility and Requirements
| Component | Supported Models |
|---|---|
| Chassis | Nexus 7004/7009/7018 |
| Supervisor Modules | N7K-SUP2E (73-16833-04 Rev. D+) |
| Fabric Modules | N7K-C7010-FAB-1/2, N7K-C7018-FAB-2 |
| Minimum NX-OS Version | 8.4(1) |
Critical Notes:
- Incompatible with chassis using legacy N7K-M132XP-12L line cards
- Requires 10GB free bootflash space on both active/standby supervisors
Obtain the Software
Licensed Cisco customers can access n7000-s2-epld.8.4.2.img through Cisco’s official Software Download portal. Visit https://www.ioshub.net for contract validation and secure distribution options.
Technical specifications validated against Cisco Nexus 7000 Series EPLD Release Notes 8.4(2). Always verify hardware compatibility using Cisco’s Hardware-Software Compatibility Matrix prior to installation.
