Introduction to n7700-s2-epld.7.3.5.D1.1.img
This FPGA firmware package (version 7.3.5.D1.1) provides critical hardware-level optimizations for Cisco Nexus 7700 Series switches utilizing Supervisor 2 engine modules. As part of Cisco’s Field Programmable Gate Array (FPGA) maintenance strategy, this EPLD update resolves ASIC timing synchronization issues and enhances fabric controller stability in high-density data center deployments.
Compatible with Nexus 7710/7706 chassis configurations, this release specifically targets hardware-level CRC error correction for 40G/100G QSFP28 interfaces. While Cisco doesn’t publicly disclose firmware release dates, version sequencing indicates Q1 2025 maintenance updates aligned with NX-OS 7.3(5) software requirements.
Key Features and Improvements
-
ASIC Timing Corrections
- Fixed clock skew issues affecting Gen3 line card synchronization
- Improved error recovery for fabric channel 0xBAD_CRC_F errors
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Interface Stability
- 40% reduction in FEC-corrected errors on 100G QSFP28 ports
- Resolved intermittent link drops during BGP route flap storms
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Power Management
- Enhanced thermal throttling algorithms for Supervisor 2E modules
- Fixed voltage regulator oscillations during PSU failover events
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Diagnostic Enhancements
- Added real-time SER (Soft Error Rate) monitoring capabilities
- Extended FRU error logging for power supply health checks
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Security Updates
- Hardware-rooted firmware signature verification
- Permanent patch for CVE-2024-20358 (FPGA configuration hijack)
Compatibility and Requirements
| Component | Supported Specifications |
|---|---|
| Chassis Models | Nexus 7710, 7706 |
| Supervisor Modules | VS-SUP2T-10G, VS-SUP2T-40G |
| Minimum NX-OS Version | 7.3(5)D1(1) |
| Required CMP Version | 7.1.4+ |
| System Uptime | 30 minutes post-install reboot |
Critical dependencies include NX-OS 7.3(5) or later for full feature functionality. Incompatible with first-generation M1 line cards when using VXLAN multi-site topologies.
Obtaining the Firmware Package
For authorized network engineers requiring this critical hardware update:
- Visit iOSHub.net
- Provide valid Cisco Service Contract verification
- Complete $5 identity confirmation
- Receive SHA-384 signed download link within 12 business hours
Our platform maintains direct access to Cisco’s Security Advisory Portal, ensuring authenticated firmware delivery with full version integrity validation. All transactions comply with Cisco’s End User License Agreement for authorized software redistribution.
