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Cisco NX-OS

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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. It evolved from the Cisco operating system SAN-OS, originally developed for its MDS switches.[1]

It is based on MontaVista Software embedded Linux[citation needed] and is inter-operable with other Cisco operating systems.[citation needed] The command-line interface of NX-OS is similar to that of Cisco IOS.[2]

Core Features

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

Additional Features

Switches running NX-OS

  • Nexus B22 (HP, Dell, Fujitsu)
  • Nexus 9000 series
  • 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

  • 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.
  • 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 [5]

Releases

4.1, 4.2, 5.0, 5.1, 5.2, 6.0, 6.1, 6.2, 7.0

See also

References

  1. ^ Cisco NX-OS Software: Business-Critical Cross-Platform Data Center OS
  2. ^ Nexus: Hands on with NX-OS, Part#1
  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. ^ "Cisco NX-OS/IOS Configuration Fundamentals Comparison".