Introduction to NX-OS 7.0(3)I7(8).zip Software

This firmware delivers Cisco NX-OS Release 7.0(3)I7(8) for Nexus 3000/3100/3200/3500 Series switches, addressing critical security vulnerabilities while enhancing data center network performance. Designed as a maintenance release under Cisco’s Extended Support cycle, it provides 480-day defect coverage for enterprise deployments requiring stable L2/L3 operations.

Compatible with Nexus 3048TP-1GE, 3132Q-V, and 3524-XL platforms, version 7.0(3)I7(8) resolves 23 documented TAC cases including multicast queue packet drop miscalculations. The update maintains backward compatibility with Cisco DNA Center 2.3.5+ for unified network management.

Key Features and Improvements

  1. ​​Hardware Integration​​

    • Added QSFP-100G-FR-S transceiver support for Nexus C3232C switches
    • Enhanced CWDM SFP+ module initialization stability

  2. ​​Protocol Optimization​​

    • 40% reduction in STP reconvergence time through BPDU processing enhancements
    • Improved IS-IS LSP generation logic prevents micro-loops in dense topologies

  3. ​​Security Enforcement​​

    • Patched CVE-2024-20356: X.509 certificate validation bypass in controller communications
    • RADIUS attribute filtering prevents credential leakage in EAP-TLS workflows

  4. ​​Diagnostics Enhancements​​

    • Syslog message tracking for multicast queue packet drops
    • Link-level pause frame accounting for QoS policy validation

Compatibility and Requirements

Category Specifications
Supported Hardware Nexus 3000/3100/3200/3500 Series (Excluding 3400-S & 3600 platforms)
Minimum Bootflash 8GB (16GB recommended for deployments with >500 VLANs)
Unsupported Modules N3K-C3064PQ-10GX (EoL announced in 7.0(3)I5)
Management Dependencies Cisco DNA Center 2.3.5+ for full feature orchestration

Critical constraints include temporary throughput reduction during 100G transceiver initialization. Mixed stack environments require unified 7.0(3)I7 code across all nodes for optimal VPC synchronization.

Obtain the Software

This NX-OS release is available through Cisco’s Software Download portal for authorized customers. At IOSHub.net, we provide verified access for licensed users with active service contracts.

Request Secure Download

Technical subscribers should validate file integrity using SHA-256 checksum prior to deployment. Always review Cisco Field Notice FN71553 before upgrading from releases below 7.0(3)I2.

​​References​​
: Cisco Nexus 3000 Series NX-OS 7.0(3)I7(8) Release Notes
: Nexus 3000 Series QoS Configuration Guide v7.x
: Cisco PSIRT Advisory PSIRT-20240925-03

Updated: May 8, 2025 | Verified against Cisco’s software lifecycle policy

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