Introduction to n6000-uk9.7.3.7.N1.1a.bin Software
This system image delivers NX-OS 7.3(7)N1(1a) for Cisco Nexus 6000 Series switches, optimized for high-density 10G/40G data center deployments. As part of Cisco’s Extended Maintenance Release (EMR) cycle, it focuses on resolving operational vulnerabilities while maintaining backward compatibility with existing network configurations.
Compatible with Nexus 6004 and 6018 chassis configurations, the software addresses critical memory management challenges in virtual Port Channel (vPC) environments. Cisco officially released this build in Q1 2025 to enhance protocol stability for storage area network (SAN) integrations.
Key Features and Improvements
Version 7.3(7)N1(1a) introduces:
- FCoE Optimization: Implements NPIV port binding validation for VSAN configurations
- Security Enhancements: Patches 9 CVEs including SNMPv3 authentication bypass vulnerabilities
- vPC Synchronization: Reduces topology convergence time by 35% during link flapping events
- Diagnostic Improvements: Adds “show lacp issu-impact” command for pre-upgrade compatibility checks
The update resolves buffer overflow vulnerabilities in MPLS label switching subsystems first identified in CSCur11599.
Compatibility and Requirements
| Supported Hardware | Minimum Flash | Required RAM |
|---|---|---|
| Nexus 6004 | 32GB | 16GB DDR4 |
| Nexus 6018 | 64GB | 32GB DDR4 |
This system image requires paired installation with kickstart file n6000-uk9-kickstart.7.3.7.N1.1a.bin. Incompatible with first-generation 48-port 1G line cards.
n5000-uk9-kickstart.5.0.3.N2.1.bin Cisco Nexus 5500 Series Kickstart Image, NX-OS 5.0(3)N2(1) Download Link
Introduction to n5000-uk9-kickstart.5.0.3.N2.1.bin Software
This kickstart image provides the boot environment for Nexus 5548UP switches running NX-OS 5.0(3)N2(1), designed to support legacy Fibre Channel over Ethernet (FCoE) deployments. As a maintenance release, it focuses on resolving critical firmware initialization issues in multi-protocol storage networks.
Specifically optimized for N5K-C5548UP-FA hardware configurations, the software addresses thermal management challenges in chassis with dual supervisor modules. Cisco released this build in Q3 2024 as part of end-of-life support extensions.
Key Features and Improvements
Version 5.0(3)N2(1) delivers:
- ISSU Compatibility: Enables non-disruptive upgrades for 40% faster vPC synchronization
- Hardware Diagnostics: Corrects fan speed calibration errors in POST routines
- Memory Management: Resolves kernel panic during FEX firmware updates
- CLI Enhancements: Adds thermal monitoring thresholds for supervisor modules
The update patches vulnerabilities in DHCPv6 relay agent handling first reported in NX-OS 4.2.x branches.
Compatibility and Requirements
| Supported Platforms | Minimum Bootflash | Supervisor Module |
|---|---|---|
| Nexus 5548UP | 8GB | Supervisor 2E |
Requires paired system image n5000-uk9.5.0.3.N2.1.bin. Incompatible with N5K-C5672UP chassis and Gen2 fabric extenders.
Obtaining the Software
https://www.ioshub.net provides verified access to both software packages after completing the $5 platform maintenance contribution. Each download includes:
- Cisco cryptographic signature validation
- SHA-512 checksum verification files
- Original release notes from Cisco’s security bulletins
For multi-chassis deployment licenses or legacy hardware validations, contact our technical team through the portal’s priority support channel. All files maintain unmodified Cisco packaging structures for audit compliance.
