COMMANDS: A Primer on Some of the Differences Between IOS and NX-OS

NX-OS is starting to be my favorite OS from Cisco.  However, dealing with IOS for so long I find myself typing the wrong commands in NX-OS and IOS.  So I thought of posting up the NX-OS v4.x commands with the IOS counterpart commands for all to see.

NX-OS Smart Call-Home	IOS Smart Call-Home	Command Description
show callhome	show call-home	Displays global Call-Home configuration
show callhome destination-profile	show call-home profile	Displays Call-Home profiles
show callhome transport-email	show call-home mail-server	Displays destination Call-Home mail server
show callhome user-def-cmds	N/A	Displays user defined "show" commands for output
NX-OS Cisco Discovery Protocol (CDP)	IOS Cisco Discovery Protocol (CDP)	Command Description
show cdp all	N/A	Displays all interfaces with CDP enabled
show cdp entry all	show cdp entry *	Displays the CDP database entries
show cdp global	show cdp	Displays Global Parameters (Enabled, Timers, etc…)
show cdp interface	show cdp interface	Displays interface specific information
show cdp neighbors	show cdp neighbors	Displays a summer list of neighbors
show cdp neighbors detail	show cdp neighbors detail	Displays detailed information per neighbor
show cdp neighbors interface	show cdp neighbors interface-type	Displays CDP neighbor for a specified interface
show cdp traffic interface	N/A - "show cdp traffic" is only global	Provides statistics on a per interface basis
NX-OS Command Scheduler	IOS Command Scheduler	Command Description
show scheduler config	N/A	Displays the scheduler configuration
show scheduler job	N/A	Displays the Jobs configured in the scheduler
show scheduler logfile	N/A	Displays the contents of the execution log file
show scheduler name	N/A	Displays the schedules configured
NX-OS Embedded Event Manager (EEM)	IOS Embedded Event Manager (EEM)	Command Description
show event manager environment	show event manager environment	Displays EEM environment variables
show event manager event-type	N/A	Displays registered event types
show event manager history	show event manager history	Displays information on history and past events
show event manager policy	N/A	Displays applets or script policies
show event manager policy-state	N/A	Displays the state of a policy
show event manager script	N/A	Displays information about a script
show event manager system-policy	show event manager policy	Displays information on system default entries
NX-OS Generic Online Diagnostics (GOLD)	IOS Generic Online Diagnostics (GOLD)	Command Description
show diagnostics bootup level	show diagnostics bootup level	Displays current bootup level
show diagnostics content module	show diagnostics content module	Displays test contents for a specified module
show diagnostics description module	show diagnostics description module	Displays description for a specified diagnostic test
show diagnostic results module	show diagnostic results module	Displays information and result of a diagnostic
show diagnostic status module	show diagnostic status	Displays test status for all tests on a module
NX-OS Netflow	IOS Netflow	Command Description
show flow exporter	show mls nde	Displays information about configured exporter maps
show flow interface	N/A	Displays interfaces configured for Netflow
show flow monitor	N/A	Displays information about monitor maps
show flow record	N/A	Displays information about record maps
show flow timeout	N/A	Displays the Netflow timeout value
show hardware flow aging	show mls netflow aging	Displays the Netflow table aging timeout value
show hardware flow entry	show mls netflow ip flow	Displays flow specific information
show hardware flow ip	show mls netflow ip	Displays the IP Netflow Table
show hardware flow sampler	show mls sampling	Displays the Netflow Sampling Configuration
show hardware flow utilization module	show mls netflow table summary	Displays Netflow table utilization per module
show sampler	show flow-sampler	Displays information about sampler maps
NX-OS Onboard Fault Logging (OBFL)	IOS Onboard Fault Logging (OBFL)	Command Description
show logging onboard module # boot-uptime	show logging onboard module # uptime	Displays OBFL boot and uptime information per module
show logging onboard module # counter-stats	N/A	Displays OBFL counter statistics per module
show logging onboard module # device-version	N/A	Displays OBFL device version information per module
show logging onboard module # endtime	show logging onboard module # end	Displays OBFL logs till end time mm/dd/yy-HH:MM:SS per module
show logging onboard module # environmental-history	show logging onboard module # temperature	Displays OBFL environmental history per module
show logging onboard module # error-stats	N/A	Displays OBFL error statistics per module
show logging onboard module # exception-log	N/A	Displays OBFL exception log per module
show logging onboard module # interrupt-stats	show logging onboard module # interrupt	Displays OBFL interrupt statistics per module
show logging onboard module # kernel-trace	N/A	Displays OBFL Kernel Trace per module
show logging onboard module # module	N/A	Displays OBFL information for Module per module
show logging onboard module # obfl-history	N/A	Displays OBFL history information per module
show logging onboard module # stack-trace	N/A	Displays OBFL kernel stack trace per module
show logging onboard module # starttime	show logging onboard module # start	Displays OBFL logs from start time mm/dd/yy-HH:MM:SS per module
show logging onboard module # status	show logging onboard module # status	Displays OBFL status enable/disable per module
NX-OS RMON	IOS RMON	Command Description
show rmon alarms	show rmon alarms	Displays configured RMON alarms
show rmon events	show rmon events	Displays configured RMON Events
show rmon hcalarms	N/A	Displays information for 64 bit alarms
show rmon logs	show rmon history	Displays RMON log messages
NX-OS SNMP	IOS SNMP	Command Description
show snmp	show snmp	Displays SNMP Counters, Users, Community Strings, etc...
show snmp community	show snmp community	Displays the SNMP community strings
show snmp context	show snmp context	Displays the SNMP Context mapping
show snmp engineID	show snmp engineID	Displays Hex and Decimal SNMP Engine ID
show snmp group	show snmp group	Displays configured SNMP groups/roles
show snmp host	show snmp host	Displays Host specific information
show snmp sessions	show snmp sessions	Displays active SNMP sessions
show snmp trap	N/A	Displays what traps are enabled
show snmp user	show snmp user	Displays SNMP users and notification targets (v3)
NX-OS Switch Port Analyzer (SPAN)	IOS Switch Port Analyzer (SPAN)	Command Description
show monitor session #	show monitor session #	Displays a specific sSPAN session
show monitor session all	show monitor session all	Displays all SPAN sessions
show monitor range #-#	show monitor range #-#	Displays a range of specified SPAN sessions
NX-OS Logging (Syslog)	IOS Logging (Syslog)	Command Description
show logging	show logging	Displays how logging is configured with log
show logging info	N/A	Displays how logging is configured without log
show logging last #	N/A	Displays the last "#" of log messages
show logging level	N/A	Displays the Facility, Default Severity, and Configured Severity
show logging logfile	N/A	Displays all of the Syslog information
show logging module	N/A	Displays the module logging configuration
show logging monitor	N/A	Displays the monitor logging configuration
show logging nvram	N/A	Displays the Severity 0, 1, and 2 message stored in NVRAM
show logging server	N/A	Displays information for each configured syslog server
show logging timestamp	N/A	Displays the configured timestamp for log messages
NX-OS NTP	IOS NTP	Command Description
show ntp peers	show ntp associations	Displays what NTP peers are configured
show ntp peer-status	show ntp status (not on a peer basis)	Shows the status of each NTP peer
show ntp source	N/A	Displays the source IP address for the NTP service
show ntp statistics peer ipaddr x.x.x.x	N/A	Show statistics for each NTP peer
show ntp timestamp-status	N/A	Displays if the timestamp check is enabled
NX-OS XML	IOS XML	Command Description
show xml server logging	N/A	Displays XML Logging
show xml server status	N/A	Displays XML Server Status

You can also find the same kind of material on the following link
http://docwiki.cisco.com/wiki/Cisco_Nexus_7000_NX-OS/IOS_Comparison_Tech_Notes