Troubleshooting Nexus 7000 - Useful commands

[Pulkit Nagpal]

• Introduction
• Prerequisites
• Commands
• For Etherchannel
• For vdc
• For vlan
• Related information

Introduction

This document can be used as a reference for troubleshooting Nexus 7000.

Prerequisites

Nexus 7000

Commands

VPC Related

show running-config vpc
show vpc consistency-parameters
show vpc
show vpc peer-keepalives
show vpc statistics

For module reset

From Sup:

show logging
show tech module X

From Module:

show logging onboard obfl-history
show logging onboard kernel-trace
show logging onboard exception-log
show logging onboard boot-uptime

For Etherchannel 

show port-channel summary
show port-channel traffic
show port-channel database
show lacp neighbor

For vdc

show vdc membership
show vdc resource
show vdc current-vdc

For vlan

show vlan vlan-id
show vlan all-ports
show vlan private-vlan
show vlan private-vlan type
show interface vlan-id private-vlan mapping
show tech-support vlan

 Related information

• Configuring onboard failure logging
• Virtual device context
• NX-OS layer 2 configuration guide
• NX-OS interface commands
• Configuring vPC
• Cheat-sheet for Catalyst 6500 with Sup 720

[Pulkit Nagpal]

Set of commands for troubleshooting on Cat 6500 with Sup 720:

https://supportforums.cisco.com/docs/DOC-18824

Regards,

Pulkit

[ayojosh2k]

Dear Pulkit,

I just deployed a nexus 7010 switch at a server farm. after deployment, it was notices that there are surges in latency across the network. The default gateway was then moved to the nexus, with this pinging from an host on the same subnet there is intermitent burst is latency

i.e

NEXUS>>>>>Server

Ping of about 80ms and sometimes even times out.

To me, this is strange.

Any ideas???

NX-OS Version is 5-02a

[Pulkit Nagpal]

Hi Joshua,

This might require analysis of certain things, like configuration, connectivity between Nexus and Server, Module etc. I suggest you please open a discussion on this in LAN, Routing and Switching section and post configuration, module information etc there.

Regards,

Pulkit

[Heather Basquill]

Another very helpful command is:

show cli list  - This will display all available cli options at your current level

example:

Nexus-router# show cli list | in show | in event-log
show hardware internal sprom event-log
show cfs internal ethernet-peer event-log