NX-OS

NX-OS

NX-OS is a network operating system designed by Cisco Systems for their own Nexus series Ethernet switches and MDS series Fibre Channel storage area network switches. NX-OS is designed to support high performance, high reliability server access switches used in the data center. NX-OS evolved from the Cisco MDS operating system, SAN-OS. SAN-OS was originally developed for the MDS line of switches.[1]

It is based on MontaVista Software embedded Linux. It is inter-operable with other Cisco operating systems. It runs on both the Nexus and MDS product lines by Cisco.

NX-OS command-line interface is IOS-like. However, some features need to be first explicitly enabled before configuring.[2]

Contents

Features

  • FCIP Fibre Channel over IP
  • FCoE Fibre Channel over Ethernet (Nexus 5000 Only/newer 7000 linecards)
  • iSCSI
  • IPSec
  • Scheduling
  • NPIV Nx port Id Virtualization
  • IVR (Inter-VSAN Routing)
  • VSAN
  • Zoning (Hard zoning)
  • Callhome
  • CFS Cisco Fabric Services (Distributed configuration)
  • SSH and Telnet
  • SME Storage Media Encryption
  • Port Channels
  • Cisco Data Mobility Manager
  • Fibre Channel Write Acceleration
  • FICON

Switches running NX-OS

  • Nexus 7000 series
  • Nexus 5000 series
  • Nexus 4000 (for IBM BladeCenter)
  • Nexus 3000
  • MDS 9500 FC Directors[3]
  • 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 go directly to EXEC mode
  • SSH server is enabled while Telnet server is disabled by default in NX-OS [5]

Releases

  • NX-OS 5.2
  • NX-OS 5.1
  • NX-OS 5.0
  • NX-OS 4.2
  • NX-OS 4.1
  • SAN-OS 3.3
  • SAN-OS 3.2
  • SAN-OS 3.1
  • SAN-OS 3.0
  • SAN-OS 2.1
  • SAN-OS 2.0
  • SAN-OS 1.0

See also

External links

References

  1. ^ Cisco NX-OS Software: Business-Critical Cross-Platform Data Center OS
  2. ^ Nexus: Hands on with NX-OS, Part#1
  3. ^ "http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps5990/ps4359/prod_brochure09186a00801ce93e_ps5991_Products_Brochure.html". http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps5990/ps4359/prod_brochure09186a00801ce93e_ps5991_Products_Brochure.html. 
  4. ^ "Cisco Nexus 7000 Series NX-OS Security Configuration Guide, Release 4.1". http://www.cisco.com/en/US/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/guide/sec_ipacls.html. 
  5. ^ "Cisco NX-OS/IOS Configuration Fundamentals Comparison". http://docwiki.cisco.com/wiki/Cisco_NX-OS/IOS_Configuration_Fundamentals_Comparison. 
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