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Cisco NX-OS

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Cisco NX-OS
DeveloperCisco Systems
OS familyUnix-like
Working stateCurrent
Source modelClosed source
Latest release10.5(1)F / July 26, 2024; 6 months ago (2024-07-26)
Official websiteCisco NX-OS

NX-OS is a network operating system for the Nexus-series Ethernet switches and MDS-series Fibre Channel storage area network switches made by Cisco Systems.[1] It evolved from the Cisco operating system SAN-OS, originally developed for its MDS switches. Cisco is responsible for its development and maintenance.[1]

The command-line interface of NX-OS is similar to that of Cisco IOS.

Development

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Cisco is responsible for development and maintenance of NX-OS.[1]

Core features

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  • System Manager (sysmgr)
  • Persistent Storage Service (PSS)
  • Message & Transaction Services (MTS)

Additional features

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Switches running NX-OS

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  • Nexus B22 (HP, Dell, Fujitsu)
  • Nexus 9000 series[2]
  • Nexus 7700 series
  • Nexus 7000 series
  • Nexus 6000 series
  • Nexus 5000 series
  • Nexus 4000 (for IBM BladeCenter)
  • Nexus 2000 series
  • Nexus 3000
  • Nexus 1000V
  • MDS 9700 FC Directors
  • MDS 9500 FC Directors[3]
  • MDS 9250i FC Switch
  • MDS 9222i FC Switch
  • MDS 9100 FC Switches

Differences between IOS and NX-OS

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  • NX-OS does not support the login command to switch users.
  • NX-OS does not distinguish between standard or extended access lists, all lists are named and "extended" in functionality.[4]
  • NX-OS did not support scp server prior to 5.1(1) release.
  • In NX-OS, there is no "write" command to save the configuration like on IOS (one uses the "copy" command, instead). Instead, command aliases can be created to provide the "write" command.[5]
  • When accessing NX-OS, users authenticate directly to their assigned privilege level.
  • SSH server is enabled while Telnet server is disabled by default in NX-OS.[6]

Releases

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4.1, 4.2, 5.0, 5.1, 5.2, 6.0, 6.1, 6.2, 7.0, 9.2, 9.3, 10.1

See also

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References

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  1. ^ a b c Cybersecurity & Infrastructure Security Agency (March 1, 2024). "Cisco Releases Security Advisories for Cisco NX-OS Software". cisa.gov.
  2. ^ "Introduction to Cisco Nexus Switches – Nexus Product Family. Differences Between Nexus NX-OS & Catalyst IOS. Comparing High-End Nexus & Catalyst Switches". Firewall.cx. Retrieved 18 February 2025.
  3. ^ Cisco Product Brocuhure Cisco MDS 9500 Series of Multilayer Directors, visited 18 May 2012
  4. ^ "Cisco Nexus 7000 Series NX-OS Security Configuration Guide, Release 4.1".
  5. ^ "Write Command On Nexus Switches". community.cisco.com. 2012-08-01. Retrieved 2024-10-05.
  6. ^ "Cisco NX-OS/IOS Configuration Fundamentals Comparison". Retrieved June 3, 2017.
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