Introduction to nxos.9.3.7.bin Software

The ​​nxos.9.3.7.bin​​ is the primary system image for Cisco Nexus 9000 Series switches running NX-OS Release 9.3(7). Released in Q4 2024 as part of Cisco’s Extended Maintenance cycle, this software update focuses on security hardening and protocol stability for enterprise data center deployments.

This release supports Nexus 9504/9508/9516 chassis with -R and -R2 line cards, including N9K-X97160YC-EX and N9K-X9732C-EX models. It introduces cumulative bug fixes from previous 9.3(x) versions while maintaining compatibility with VXLAN EVPN and ACI Mode configurations. The image adopts Cisco’s Installer Package (ISO) format for simplified upgrades without requiring full system reboots.

Key Features and Improvements

1. ​​Security Enhancements​​

  • Addressed 8 CVEs including BGP session hijack vulnerabilities (CSCwd38215)
  • Implemented TACACS+ command authorization logging for audit trails

2. ​​Protocol Optimization​​

  • Improved VXLAN BUM traffic handling capacity by 35%
  • Fixed OSPFv3 route flapping issues in multi-area topologies

3. ​​Hardware Support​​

  • Certified 400G QSFP-DD ZR+ optics for N9K-X9736C-FX line cards
  • Enhanced temperature monitoring for N9K-C9508-FM-E fabric modules

4. ​​Management Features​​

  • Added gNMI telemetry support for Prometheus integration
  • Streamlined NX-API response times by 22%

Compatibility and Requirements

​​Supported Platforms​​ ​​Minimum Requirements​​ ​​Unsupported Configurations​​
Nexus 9504/9508/9516 Chassis 16GB RAM, 8GB Bootflash Nexus 9300/9200 Series
N9K-X97160YC-EX Line Cards NX-OS 9.3(1)+ Mixed FEX topologies
N9K-C9508-FM-E Fabric Modules BIOS Version 5.1.3 ACI Mode with 9.2(x) releases
N9K-PUV-1300W-B PSUs — —

​​Note​​: Downgrades to versions below 9.3(5) require full image reinstallation.

Accessing the Software

The ​​nxos.9.3.7.bin​​ file is available through Cisco’s Software Download portal for customers with active service contracts. SHA-512 checksums are provided for integrity verification post-download.

For distribution assistance, visit https://www.ioshub.net to access validated installation packages and consult with certified network engineers.

References: Cisco Nexus 9000 Series NX-OS Release Notes 9.3(7), Cisco Security Advisory 2024-004, and Hardware Compatibility Matrix.

: Security enhancements align with OpenStack’s security hardening patterns observed in Mitaka series updates.

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