Summary

Cisco NX-OS is a network operating system developed by Cisco Systems, designed specifically for Cisco’s data center networking hardware, including switches and routers in the Nexus and MDS product lines. It is optimized for high performance, scalability, and reliability, making it suitable for enterprise and service provider environments requiring advanced data center solutions.

General

Show Interfaces

 show int status

 show int description

Add an Allowed VLAN to an Interface

Don't forget add, unless you want to blow away all existing VLANs allowed on the interface

 interface e 1/25
   switchport trunk allowed vlan add 1635

Show MAC Table for a VLAN

 show mac address-table vlan 3

Clear an Entry from the MAC Table

 clear mac address-table dynamic address c0c5.20a3.3f25

Virtual Port Channel

vPC (Virtual Port Channel) is a technology that allows two Cisco Nexus switches to appear as a single logical switch to connected devices. This enables enhanced redundancy, load balancing, and seamless failover while maintaining high availability in a data center network.

Show vPC Info

 show vpc br

Show vPC Inconsistencies

 show vpc consistency-parameters vpc 7

vPC Config

Example:

 interface port-channel2
   description ResNet1
   switchport mode trunk
   switchport trunk allowed vlan 163,171,220,230,241-246,2100-2117,2360
   mtu 9216
   vpc 2