Troubleshooting Basics; Troubleshooting Guidelines; Gathering Information - Cisco Nexus 1000V Troubleshooting Manual

Troubleshooting Basics

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Troubleshooting Basics
This section introduces questions to ask when troubleshooting a problem with the Cisco Nexus 1000V
or connected devices. Use the answers to these questions to identify the scope of the problem and to plan
a course of action.
This section includes the following topics:
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Troubleshooting Guidelines

By answering the questions in the following subsections, you can determine the paths that you need to
follow and the components that you should investigate further.
Answer the following questions to determine the status of your installation:
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To discover a network problem, follow these teps:
Gather information on problems in your system. See the
Step 1
Step 2 Verify the Layer 2 connectivity. See the
Step 3 Verify the configuration for your end devices (storage subsystems and servers).
Step 4 Verify end-to-end connectivity. See the

Gathering Information

This section highlights the tools that are commonly used to troubleshoot problems within your network.
These tools are a subset of what you might use to troubleshoot your specific problem.
Each chapter in this guide includes additional tools and commands that are specific to the symptoms and
possible problems covered in that chapter.
Cisco Nexus 1000V Troubleshooting Guide, Release 5.2(1)SV3(1.1)
1-2
Verify and troubleshoot any new configuration changes after implementing the change.
Troubleshooting Guidelines, page 1-2
Gathering Information, page 1-2
Verifying Ports, page 1-3
Verifying Layer 2 Connectivity, page 1-3
Verifying Layer 3 Connectivity, page 1-3
Is this a newly installed system or an existing installation? (It could be a new host, switch, or
VLAN).
Has the host ever been able to see the network?
Are you trying to solve an existing application problem (too slow, high latency, excessively long
response time) or did the problem show up recently?
What changed in the configuration or in the overall infrastructure immediately before the
applications started to have problems?
"Gathering Information" section on page
"Verifying Layer 2 Connectivity" section on page
"Verifying Layer 3 Connectivity" section on page
Chapter 1 Overview
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