Cisco Nexus switches use the Cisco NX-OS Software. These comparisons are based on Cisco Nexus 7000 switches.
The following article compares default configuration differences between Cisco NX-OS Software and Cisco IOS Software.
The following articles compare Cisco NX-OS Software with Cisco IOS Software for common features:
- Cisco NX-OS/IOS Configuration Fundamentals Comparison
- Cisco NX-OS/IOS BGP (Basic) Comparison
- Cisco NX-OS/IOS BGP (Advanced) Comparison
- Cisco NX-OS/IOS DHCP Relay Comparison
- Cisco NX-OS/IOS EIGRP Comparison
- Cisco NX-OS/IOS HSRP Comparison
- Cisco NX-OS/IOS Interface Comparison
- Cisco NX-OS/IOS Layer-3 Virtualization Comparison
- Cisco NX-OS/IOS Multicast Comparison
- Cisco NX-OS/IOS Netflow Comparison
- Cisco NX-OS/IOS OSPF Comparison
- Cisco NX-OS/IOS Port-Channel Comparison
- Cisco NX-OS/IOS SPAN Comparison
- Cisco NX-OS/IOS STP Comparison
- Cisco NX-OS/IOS TACACS+, RADIUS, and AAA Comparison
Source : http://docwiki.cisco.com/wiki/Cisco_Nexus_7000_NX-OS/IOS_Comparison_Tech_Notes