SOFTWARE AND HARDWARE TOOLS

Chapter 19

Network Troubleshooting

Spring, 2013

Narrowing Down the Problem

Did you check the super simple stuff?

Is hardware or software causing the problem?

Is it a workstation or server problem?

Which segments of the network are affected?

Super Simple Stuff (SSS)

Check to ensure…

Look for…

Check all…

Look for…

Hardware or Software?

Usually involves three things:

Workstation or Server Problem?

How to check:

Check which segments are affected:

Cabling Issues (what to look for) Issues at night? (haunted?) Crosstalk Nearing or near-end crosstalk Attenuation Collisions Shorts Open impedance mismatch (echo) Interference

Wireless Issues

Interference Incorrect encryption Incorrect channel Incorrect frequency ESSID mismatch Standard mismatch Distance Bounce Incorrect antenna placement

Troubleshooting Steps

1.

2.

3.

Troubleshooting Steps

4.

5.

6.

Troubleshooting Steps

7.

8.

9.

Troubleshooting Tips

Don’t overlook the SSS

Prioritize your problems

Check software configuration

Troubleshooting Tips

Don’t overlook physical conditions

Don’t overlook cable problems

Check for viruses

Oh, by the way…