• Source: Cisco 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. It evolved from the Cisco operating system SAN-OS, originally developed for its MDS switches.
      It is based on Wind River Linux and is inter-operable with other Cisco operating systems. The command-line interface of NX-OS is similar to that of Cisco IOS.
      Recent NX-OS has both Cisco-style CLI and Bash shell available. On NX-OS 7.0(3)I3, the output from uname with the -a command line argument might look like the text below:


      Core features


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


      Additional features


      Fibre Channel and FICON
      FCIP
      FCoE (Nexus 5000/7000 linecards)
      iSCSI
      IPsec
      Scheduling
      NPIV NX Port ID Virtualization
      Inter–VSAN Routing
      VSAN
      Zoning (Hard zoning)
      Callhome
      Cisco Fabric Services (distributed configuration)
      SSH and Telnet
      Storage Media Encryption
      Port Channels
      Cisco Data Mobility Manager
      Fibre Channel Write Acceleration


      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
      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.
      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.


      Releases


      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


      Cisco IOS
      Cisco IOS XE
      Cisco IOS XR
      FTOS – competitor Force10's operating system FTOS


      References




      External links


      Cisco Content Hub
      Cisco Feature Navigator
      intro
      data sheet

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