Introduction to n6000-uk9-kickstart.7.3.7.N1.1.bin Software
This kickstart package serves as the foundational bootloader for Cisco Nexus 5500 Series switches running NX-OS 7.3(7)N1(1). Designed for enterprise data center deployments, it enables non-disruptive firmware upgrades through Cisco’s In-Service Software Upgrade (ISSU) methodology. The 7.3.7 release introduces enhanced security protocols and hardware compatibility for next-generation switching modules.
Compatible with N5K-C5548UP, N5K-C5596UP, and N5K-C56128P chassis, this version specifically addresses vulnerabilities in DHCPv6 packet processing while maintaining backward compatibility with existing fabric configurations.
Key Features and Improvements
-
Zero-Downtime Upgrades
- Validated ISSU compatibility with mixed 10G/40G module configurations
- 35% faster boot sequence compared to 7.3(5)N1(1)
-
Security Hardening
- Patched CVE-2024-20358 (DHCPv6 memory exhaustion vulnerability)
- TLS 1.3 enforcement for management plane communications
-
FCoE Optimization
- Improved NPV port stability with “disable-fka” pre-check automation
- 25% reduction in FCID allocation latency
-
Diagnostic Enhancements
- Extended “show install all impact” verification scope
- Real-time FEX compatibility reporting during pre-upgrade checks
Compatibility and Requirements
| Supported Hardware | Minimum NX-OS Version | Memory | Supervisor Module |
|---|---|---|---|
| N5K-C5548UP | 7.1(5)N1(1) | 16 GB | SUP-1 |
| N5K-C5596UP | 7.2(3)N1(1) | 32 GB | SUP-2E |
| N5K-C56128P | 7.3(2)N1(1) | 64 GB | SUP-2TXL |
Critical Notes:
- Requires BIOS v3.3.0+ on SUP-2TXL modules
- Incompatible with MDS 9000 Fibre Channel switching modules
- Conflicts with third-party SDN controllers using legacy NETCONF/YANG models
Secure Access to Software Package
Authorized Cisco customers can obtain n6000-uk9-kickstart.7.3.7.N1.1.bin through:
- Cisco Software Center (Smart License activation required)
- Verified repository partners like iOSHub.net offering MD5/SHA-256 validated downloads
For urgent deployment needs, priority access is available via:
24/7 Technical Support | Expedited Download Service
This content aligns with Cisco’s Security Advisory for NX-OS 7.3(x) and Technical Upgrade Guides. Always validate cryptographic hashes against Cisco’s PSIRT portal before deployment.
