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Cisco NX-OS
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<h2 id="development">Development</h2> <p>Cisco is responsible for development and maintenance of NX-OS.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> <h2 id="core-features">Core features</h2> <ul><li>System Manager (sysmgr)</li> <li>Persistent Storage Service (PSS)</li> <li>Message & Transaction Services (MTS)</li></ul> <h2 id="additional-features">Additional features</h2> <ul><li><a href="/facts/Fibre_Channel/C7C0yreb">Fibre Channel</a> and <a href="/facts/FICON/sX4NCdzH">FICON</a></li> <li><a href="/facts/FCIP/jSy8aBqW">FCIP</a></li> <li><a href="/facts/FCoE/F6aokxVE">FCoE</a> (Nexus 5000/7000 linecards)</li> <li><a href="/facts/ISCSI/oxaQpYBc">iSCSI</a></li> <li><a href="/facts/IPsec/01MwcET1">IPsec</a></li> <li>Scheduling</li> <li><a href="/facts/NPIV/rduAVTyj">NPIV</a> NX Port ID Virtualization</li> <li>Inter–VSAN Routing</li> <li><a href="/facts/VSAN/4RoUxSPc">VSAN</a></li> <li>Zoning (Hard zoning)</li> <li>Callhome</li> <li>Cisco Fabric Services (distributed configuration)</li> <li><a href="/facts/Secure_Shell/wjVRw5zv">SSH</a> and <a href="/facts/Telnet/hxT0e85h">Telnet</a></li> <li>Storage Media Encryption</li> <li>Port Channels</li> <li>Cisco Data Mobility Manager</li> <li>Fibre Channel Write Acceleration</li></ul> <h2 id="switches-running-nx-os">Switches running NX-OS</h2> <ul><li>Nexus B22 (HP, Dell, Fujitsu)</li> <li>Nexus 9000 series<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a></li> <li>Nexus 7700 series</li> <li>Nexus 7000 series</li> <li>Nexus 6000 series</li> <li>Nexus 5000 series</li> <li>Nexus 4000 (for <a href="/facts/IBM_BladeCenter/XfHbTe6E">IBM BladeCenter</a>)</li> <li>Nexus 2000 series</li> <li>Nexus 3000</li> <li>Nexus 1000V</li> <li>MDS 9700 FC Directors</li> <li>MDS 9500 FC Directors<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a></li> <li>MDS 9250i FC Switch</li> <li>MDS 9222i FC Switch</li> <li>MDS 9100 FC Switches</li></ul> <h2 id="differences-between-ios-and-nx-os">Differences between IOS and NX-OS</h2> <ul><li>NX-OS does not support the login command to switch users.</li> <li>NX-OS does not distinguish between standard or extended access lists, all lists are named and "extended" in functionality.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a></li> <li>NX-OS did not support scp server prior to 5.1(1) release.</li> <li>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.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a></li> <li>When accessing NX-OS, users authenticate directly to their assigned privilege level.</li> <li><a href="/facts/Secure_Shell/wjVRw5zv">SSH</a> server is enabled while <a href="/facts/Telnet/hxT0e85h">Telnet</a> server is disabled by default in NX-OS.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a></li></ul> <h2 id="releases">Releases</h2> <p>4.1, 4.2, 5.0, 5.1, 5.2, 6.0, 6.1, 6.2, 7.0, 9.2, 9.3, 10.1 </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Cisco_IOS/jwcRuzX8">Cisco IOS</a></li> <li><a href="/facts/Cisco_IOS_XE/sMm4qPkf">Cisco IOS XE</a></li> <li><a href="/facts/Cisco_IOS_XR/lJnKM8tC">Cisco IOS XR</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="https://content.cisco.com/welcome.html">Cisco Content Hub</a></li> <li><a href="https://cfnng.cisco.com">Cisco Feature Navigator</a></li> <li><a href="http://www.cisco.com/en/US/products/ps9372/index.html">intro</a></li> <li><a href="http://www.cisco.com/en/US/prod/collateral/iosswrel/ps9494/ps9372/data_sheet_c78-652063.html">data sheet</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Cybersecurity & Infrastructure Security Agency (March 1, 2024). "Cisco Releases Security Advisories for Cisco NX-OS Software". cisa.gov. <a href="/wiki/Cybersecurity_%26_Infrastructure_Security_Agency" target="_blank">/wiki/Cybersecurity_%26_Infrastructure_Security_Agency</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Cybersecurity & Infrastructure Security Agency (March 1, 2024). "Cisco Releases Security Advisories for Cisco NX-OS Software". cisa.gov. <a href="/wiki/Cybersecurity_%26_Infrastructure_Security_Agency" target="_blank">/wiki/Cybersecurity_%26_Infrastructure_Security_Agency</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Cybersecurity & Infrastructure Security Agency (March 1, 2024). "Cisco Releases Security Advisories for Cisco NX-OS Software". cisa.gov. <a href="/wiki/Cybersecurity_%26_Infrastructure_Security_Agency" target="_blank">/wiki/Cybersecurity_%26_Infrastructure_Security_Agency</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"Introduction to Cisco Nexus Switches – Nexus Product Family. Differences Between Nexus NX-OS & Catalyst IOS. Comparing High-End Nexus & Catalyst Switches". Firewall.cx. Retrieved 18 February 2025. <a href="https://www.firewall.cx/cisco/cisco-data-center/introduction-nexus-family-nx-os-ios-differences.html#cisco-nexus-product-family" target="_blank">https://www.firewall.cx/cisco/cisco-data-center/introduction-nexus-family-nx-os-ios-differences.html#cisco-nexus-product-family</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Cisco Product Brocuhure Cisco MDS 9500 Series of Multilayer Directors, visited 18 May 2012 <a href="http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps5990/ps4359/prod_brochure09186a00801ce93e_ps5991_Products_Brochure.html" target="_blank">http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps5990/ps4359/prod_brochure09186a00801ce93e_ps5991_Products_Brochure.html</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>"Cisco Nexus 7000 Series NX-OS Security Configuration Guide, Release 4.1". <a href="http://www.cisco.com/en/US/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/guide/sec_ipacls.html" target="_blank">http://www.cisco.com/en/US/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/guide/sec_ipacls.html</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"Write Command On Nexus Switches". community.cisco.com. 2012-08-01. Retrieved 2024-10-05. <a href="https://community.cisco.com/t5/switching/write-command-on-nexus-switchs/td-p/1958386" target="_blank">https://community.cisco.com/t5/switching/write-command-on-nexus-switchs/td-p/1958386</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>"Cisco NX-OS/IOS Configuration Fundamentals Comparison". Retrieved June 3, 2017. <a href="http://docwiki.cisco.com/wiki/Cisco_NX-OS/IOS_Configuration_Fundamentals_Comparison" target="_blank">http://docwiki.cisco.com/wiki/Cisco_NX-OS/IOS_Configuration_Fundamentals_Comparison</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> </ol>