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. 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 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 DirectorsCisco Product Brocuhure Cisco MDS 9500 Series of Multilayer Directors, visited 18 May 2012 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
References
External links Cisco Content Hub Cisco Feature Navigator intro data sheet