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Wikipedia / Cisco NX-OS

NX-OS is a network operating system for the Nexus-series Ethernet switcheses 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. Cisco is responsible for its development and maintenance.

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

Development

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

Core features

  • System Manager (sysmgr)

  • Persistent 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

  • 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

References