Basic Troubleshooting

[Armymanryno]

Can someone go over or explain some basic troubleshooting - like what common command are used and what to look for when those commands are run?

For example: switchport keeps doing up and down every few minutes. What can I look for to help determine the issue? Input errors or CRC? 

Much appreciated!

[Mark Malone · Accepted solution]

Hi
this may help , some good pointers in both links
https://www.petri.com/troubleshoot-vlan-switch
https://www.pluralsight.com/blog/it-ops/cisco-network-troubleshooting

[Armymanryno]

Thank you!

[Mark Malone]

If your stuck with anything just post back to the thread we can take a look but that should get you started at least with some basics steps

[Leo Laohoo]

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@Armymanryno wrote:

For example: switchport keeps doing up and down every few minutes. What can I look for to help determine the issue? Input errors or CRC? 

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Post the complete output to the command "sh interface <PORT> controll".