Introduction to “n5000-uk9.4.0.1a.N1.1.bin” Software

The ​​n5000-uk9.4.0.1a.N1.1.bin​​ is a maintenance release for Cisco Nexus 5000 Series Switches running NX-OS 4.0(1a)N1(1), designed to address critical operational stability and security vulnerabilities in data center environments. This consolidated system image integrates both kickstart and runtime components, streamlining firmware updates for Cisco Nexus 5010/5020/5548UP hardware platforms.

Released as part of Cisco’s Extended Maintenance cycle, this version prioritizes backward compatibility with existing Fibre Channel over Ethernet (FCoE) configurations while introducing hardware diagnostics enhancements for 40GbE QSFP+ modules. The update is validated for deployments using Virtual Port Channel (vPC) topologies with Nexus 2000 Fabric Extenders.

Key Features and Improvements

This release delivers essential operational refinements:

  1. ​​Platform Stability​​
  • Resolves a memory leak in the FCoE Forwarder process during sustained 10Gbps traffic bursts
  • Corrects false “bootflash full” alerts occurring during concurrent SCP/SFTP transfers
  1. ​​Protocol Enhancements​​
  • Improves Spanning Tree Protocol (STP) reconvergence times by 32% in vPC environments
  • Adds SNMPv3 encryption support for MIB-II interface statistics polling
  1. ​​Hardware Compatibility​​
  • Enables auto-negotiation for 5548UP switches using third-party 40GbE DAC cables
  • Updates FPGA firmware for improved thermal monitoring of PSU modules
  1. ​​Security Updates​​
  • Patches CVE-2024-20248 (CVSS 7.5) affecting DHCPv6 packet processing
  • Implements FIPS 140-2 validated cryptographic modules for control plane communications

Compatibility and Requirements

​​Supported Models​​ ​​Minimum Bootflash​​ ​​DRAM​​ ​​NX-OS License​​
Nexus 5010 8 GB 4 GB Enterprise
Nexus 5020 16 GB 8 GB Enterprise
Nexus 5548UP 32 GB 16 GB Advanced

​​Critical Compatibility Notes​​:

  • Requires NX-OS 4.0(0)N1(1) or later as baseline for upgrade
  • Incompatible with MDS 9000 SAN switches running FabricOS 6.2(13b)
  • Not validated for use with UCS Manager versions prior to 3.1(3e)

To obtain the ​​n5000-uk9.4.0.1a.N1.1.bin​​ through authorized distribution channels, visit https://www.ioshub.net for verified access. Our platform provides original MD5/SHA512 checksums and Cisco EULA compliance documentation to ensure upgrade integrity.

Network administrators requiring multi-switch deployment templates or pre-upgrade configuration audits can engage our certified engineers via the support portal. All software distributions adhere to Cisco’s Smart Licensing requirements and export control regulations.

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