1-3
Cisco Nexus 1000V Troubleshooting Guide, Release 5.2(1)SV3(1.1)
OL-31593-01
Chapter 1 Overview
Troubleshooting Basics
You should also have an accurate topology of your network to help isolate problem areas.
Use the following commands and examine the outputs:
•
show module
•
show version
•
show running-config
•
show logging log
•
show interfaces brief
•
show vlan
•
show accounting log
•
show tech support svs
Note
To use commands with the
internal
keyword, you must log in with the network-admin role.
Verifying Ports
Answer the following questions to verify ports:
•
Are you using the correct media copper or optical fiber type.
•
Is the media broken or damaged?
•
Are you checking a virtual Ethernet port? If so, use the
show interface brief
command. The status
should be up.
•
Are you checking a physical Ethernet port? If so, you need to check it by looking at the server or by
looking at an upstream switch.
•
Check if the network adapters of the Virtual Supervisor Module (VSM) virtual machine (VM) are
assigned the right port groups and if all of them are connected from vSphere Client.
Verifying Layer 2 Connectivity
Answer the following questions to verify Layer 2 connectivity:
•
Are the necessary interfaces in the same VLANs?
•
Are all ports in a port channel configured the same for speed, duplex, and trunk mode?
Use the
show vlan brief
command. The status should be up.
Use the
show port-profile
command to check a port profile configuration.
Use the
show interface-brief
command to check the status of a virtual Ethernet port or a physical
Ethernet port.
Verifying Layer 3 Connectivity
Answer the following questions to verify Layer 3 connectivity:
•
Have you configured a gateway of last resort?