Cisco NX-OS Command Reference

feature vpc

Enables the Virtual Port Channel (vPC) feature on the Nexus switch, allowing the creation of vPC domains for multi-chassis link aggregation.

Global Config

peer-keepalive destination [ip]

Configures the destination IP address for the Virtual Port Channel (vPC) peer-keepalive link, which monitors the health of the vPC peer device.

VPC Domain Config

show vpc

Displays the status and configuration of Virtual Port Channel (vPC) on Cisco NX-OS switches.

EXEC

show vpc brief

Displays a summary of the vPC status, including domain ID, peer link status, and consistency parameters.

EXEC

show vpc consistency-parameters

Displays the consistency parameters for vPC links, ensuring that both peer switches have identical configurations to prevent traffic disruption.

EXEC

vpc [id]

Assigns a Virtual Port Channel (vPC) domain ID to an interface, enabling it to participate in a vPC with a peer switch.

Interface Config

vpc domain [id]

Enters VPC domain configuration mode and creates or modifies a Virtual Port Channel domain with a specified ID.

Global Config

vpc peer-link

Configures an interface as a Virtual Port Channel (vPC) peer-link, which is used to synchronize state and forward traffic between vPC peer switches.

Interface Config

feature nv overlay

Enables the NX-OS overlay feature, which is required for VXLAN and other overlay networking technologies.

Global Config

feature vn-segment-vlan-based

Enables VLAN-based VXLAN network segmentation on the switch, allowing VLANs to be mapped to VXLAN segments.

Global Config

interface nve1

Enters NVE (Network Virtualization Edge) interface configuration mode to configure VXLAN tunnel endpoints.

Global Config

member vni [id] ingress-replication protocol bgp

Configures a VNI member under an NVE interface to use ingress replication with BGP as the control plane for VXLAN.

NVE Config

show nve peers

Displays information about NVE peers, including their IP addresses, interface state, uptime, and control-plane or data-plane learning details.

EXEC

show nve vni

Displays the operational state and configuration of Network Virtualization Edge (NVE) VNI members, including local and remote endpoints, multicast groups, and VNI state.

EXEC

vn-segment [vni-id]

Maps a VLAN to a VXLAN Network Identifier (VNI) to enable VXLAN bridging and routing on Cisco Nexus switches.

VLAN Config

feature bgp

Enables the BGP routing protocol on the Cisco NX-OS device.

Global Config

neighbor [ip] remote-as [asn]

Establishes a BGP peering session with a neighbor by specifying its IP address and autonomous system number.

BGP Config

router bgp [asn]

Enters BGP router configuration mode for the specified autonomous system number.

Global Config

show bgp ipv4 unicast summary

Displays a summary of BGP IPv4 unicast neighbor status, including prefixes received and state information.

EXEC

feature ospf

Enable the OSPF routing protocol process on the switch.

Global Config

ip router ospf [pid] area [area-id]

Enables OSPF routing on an interface and assigns it to a specific OSPF process and area.

Interface Config

router ospf [process-id]

Enters OSPF router configuration mode for a specified process ID to configure OSPF routing protocol parameters.

Global Config

show ip ospf database

Displays the OSPF link-state database (LSDB) for a specified OSPF process, showing all LSAs known to the router.

EXEC

show ip ospf neighbors

Displays OSPF neighbor information on Cisco NX-OS devices.

EXEC

name [vlan-name]

Assigns a descriptive name to a VLAN for easier identification in configurations and show commands.

VLAN Config

show vlan

Displays VLAN information including VLAN IDs, names, status, and ports assigned to each VLAN.

EXEC

show vlan brief

Displays a summary of all VLANs configured on the switch, including VLAN ID, name, status, and ports.

EXEC

state active

Sets the administrative state of a VLAN to active, enabling it for Layer 2 switching.

VLAN Config

switchport access vlan [id]

Assigns a specific VLAN to an access port, placing the interface in that VLAN for untagged traffic.

Interface Config

switchport mode access

Configures an interface as a Layer 2 access port, placing it in a single VLAN and removing any trunking behavior.

Interface Config

switchport mode trunk

Configures a switch interface as a trunk port, allowing multiple VLANs to traverse the link.

Interface Config

switchport trunk allowed vlan [list]

Configures the list of VLANs allowed on a trunk interface on Cisco NX-OS (Nexus) switches.

Interface Config

vlan [id]

Creates or enters VLAN configuration mode for a specific VLAN ID on Cisco NX-OS.

Global Config

show spanning-tree

Displays the Spanning Tree Protocol (STP) status and configuration for all VLANs or a specific VLAN on Cisco NX-OS switches.

EXEC

show spanning-tree brief

Displays a brief summary of the Spanning Tree Protocol (STP) state for all VLANs or a specified VLAN on Cisco NX-OS switches.

EXEC

spanning-tree mode [rapid-pvst|mst]

Configures the Spanning Tree Protocol (STP) mode to either Rapid PVST+ or MST on a Cisco Nexus switch.

Global Config

spanning-tree port type edge

Configures a port as an edge port (PortFast) to immediately transition to forwarding state, bypassing STP listening and learning phases.

Interface Config

spanning-tree vlan [id] priority [value]

Sets the bridge priority for a specific VLAN to influence root bridge election in Spanning Tree Protocol.

Global Config

channel-group [id] mode [active|passive|on]

Assigns an interface to a port-channel and sets the LACP negotiation mode.

Interface Config

feature lacp

Enables Link Aggregation Control Protocol (LACP) on the switch to allow dynamic formation of port channels.

Global Config

interface port-channel [id]

Creates or enters interface configuration mode for a port-channel (EtherChannel) interface on Cisco NX-OS.

Global Config

show lacp neighbor

Displays detailed LACP neighbor information for all port-channels or a specified interface, including partner system ID, port, and LACP state.

EXEC

show port-channel summary

Displays a summary of all configured port channels, including their status, protocol, and member interfaces.

EXEC

feature interface-vlan

Enables the creation and configuration of VLAN interfaces (SVI) on the switch.

Global Config

show interface

Displays the status and configuration of all interfaces or a specified interface on a Cisco Nexus switch.

EXEC

show interface brief

Displays a summary of all interfaces on the switch, including their status, protocol, and basic configuration.

EXEC

show ip interface brief

Displays a summary of all IP interfaces, including their status, protocol state, and IP address.

EXEC

ip route [prefix] [mask] [next-hop]

Configures a static route in the routing table on Cisco NX-OS devices.

Global Config

show ip route

Displays the current IP routing table, including directly connected, static, and dynamic routes learned via routing protocols.

EXEC

show ip route summary

Displays a summary of the IP routing table, including route counts by protocol and network prefixes.

EXEC

deny ip [source] [dest] log

Creates an ACL entry that denies IP traffic from source to destination and logs matches.

ACL Config

ip access-group [name] [in|out]

Applies an IPv4 ACL to an interface for inbound or outbound traffic filtering.

Interface Config

ip access-list [name]

Creates or modifies an IP access list to filter traffic based on source and destination addresses, protocols, and ports.

Global Config

permit ip [source] [dest]

Configures a permit rule in an IPv4 ACL to allow traffic matching specified source and destination addresses.

ACL Config

show ip access-lists

Displays the contents of all IPv4 and IPv6 access control lists (ACLs) configured on the device, including statistics for each entry.

EXEC

feature hsrp

Enables the Hot Standby Router Protocol (HSRP) feature on the switch, allowing configuration of HSRP groups for first-hop redundancy.

Global Config

hsrp [group]

Configures HSRP (Hot Standby Router Protocol) parameters on an interface for gateway redundancy.

Interface Config

ip [virtual-ip]

Configures a virtual IP address for an HSRP group on a Cisco Nexus interface.

HSRP Config

priority [value] forwarding-threshold lower [l] upper [u]

Configures HSRP priority and sets forwarding thresholds to control active router election and preemption behavior.

HSRP Config

show hsrp

Displays Hot Standby Router Protocol (HSRP) status and configuration information for all groups or a specified interface/group on Cisco NX-OS (Nexus) switches.

EXEC

show hsrp brief

Displays a summary of all HSRP groups configured on the switch, including group state, virtual IP, and active/standby routers.

EXEC

checkpoint [name]

Creates a named checkpoint of the current running configuration that can be used to roll back to a known state.

EXEC

copy running-config startup-config

Saves the active running configuration to the startup configuration file so that it persists after a reload.

EXEC

rollback running-config checkpoint [name]

Rolls back the running configuration to a previously saved checkpoint.

EXEC

show environment

Displays the environmental status of the chassis, including temperature, voltage, power supply, and fan information.

EXEC

show feature

Displays the status of all licensed and unlicensed features on the Cisco Nexus switch, including whether each feature is enabled or disabled.

EXEC

show module

Displays the status, hardware model, serial number, and software version of all modules installed in the chassis.

EXEC

show processes cpu

Displays CPU utilization statistics for processes running on the Cisco Nexus switch.

EXEC

show processes memory

Displays memory usage statistics for all processes running on the Cisco Nexus switch.

EXEC

show running-config

Displays the current running configuration of the Cisco NX-OS device.

EXEC

show version

Displays system hardware and software information including version, uptime, and hardware details.

EXEC

ping [ip]

Tests basic network connectivity to a remote host by sending ICMP echo requests and waiting for replies.

EXEC

show hardware

Displays hardware inventory, status, and environmental information for Cisco Nexus switches.

EXEC

show logging

Displays system logging messages and configuration for Cisco NX-OS devices.

EXEC

show tech-support

Collects a comprehensive set of system information for troubleshooting and technical support.

EXEC

traceroute [ip]

Traces the route packets take from the Nexus switch to a destination IP address, showing each hop along the path.

EXEC

show cdp neighbors detail

Displays detailed information about neighboring devices discovered via the Cisco Discovery Protocol (CDP), including device ID, platform, capabilities, and IP addresses.

EXEC

show lldp neighbors detail

Displays detailed information about LLDP neighbors discovered on the switch.

EXEC