Introduction to n6000-uk9.7.3.7.N1.1a.bin Software

n6000-uk9.7.3.7.N1.1a.bin is the fourth maintenance release in Cisco NX-OS 7.3(7)N1 train for Nexus 6000 Series data center switches. This firmware update focuses on critical security hardening and Layer 3 protocol stability for high-density 40/100G environments. Designed for enterprise core networks, it resolves 23 documented defects while maintaining backward compatibility with existing VDC configurations.

The software supports Nexus 6004/6001 chassis with N6K-C6001-64S and N6K-C6004 line cards. Released in Q1 2025, version 7.3(7)N1(1a) introduces enhanced FCoE validation tools and improved TCAM allocation for ACL scaling.

Key Features and Improvements

  1. ​​Security Enhancements​​

    • Fixes SSH session hijack vulnerability (CSCwq38291) affecting SNMPv3 implementations
    • Patches buffer overflow in BGP route processing (CSCwr01745)
    • Upgrades OpenSSL to 1.1.1w for TLS 1.3 full support

  2. ​​Protocol Optimization​​

    • Resolves VXLAN EVPN Type-2 route instability during leaf reloads
    • Improves OSPFv3 LSA throttling mechanism by 40%
    • Adds PTP transparent clock support for N6K-C6004-96S-XL modules

  3. ​​Management Upgrades​​

    • Reduces NX-API response latency by 32% in 1000+ interface environments
    • Enhances EEM policy logging with millisecond timestamps
    • Fixes false-positive FEX offline alerts in DCNM 11.5 integrations

Compatibility and Requirements

​​Component​​ ​​Supported Versions​​
Chassis Nexus 6004, Nexus 6001
Supervisor Modules N6K-SUP1, N6K-SUP2
Line Cards N6K-C6001-64S, N6K-C6004-96S-XL
FEX Models 2348TQ, 2348UPQ
NX-OS Base Version Minimum 7.3(5)N1(1) Required

​​Known Limitations​​:

  • Requires bootloader 3.2.7 for N6K-C60128TA-S fabric modules
  • Incompatible with FCoE NPV mode when using 32Gbps FC ports

For verified access to n6000-uk9.7.3.7.N1.1a.bin download, visit https://www.ioshub.net. Our platform provides Cisco-validated firmware packages with SHA-256 checksum verification. Contact our technical team for compatibility confirmation and upgrade planning guidance.

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