Cisco – View Power On Self Test (POST) details on Cisco 1841 Routers and Cisco 2950 switches

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I need to view POST details on Cisco 1841 Routers and Cisco 2950 switches.

I have tried show post and show diagnostics post. However, both these commands are not available.

What is the command that needs to be used?

Thank you for your time!

Best Answer

show post should work on the Catalyst 2950, maybe you need to upgrade to a newer version of IOS? Even if it works, it won't display more than "Pass" or "Fail".

For the 1841, I don't think there is a command to show post information.

For Cisco IOS, the equivalent command is show diagnostic which was introduced in 12.1(11b)E for the Catalyst 6000 series and show diagnostics(with an s) which was introduced in for the Catalyst 4000 Series. Both commands display Power-On Self Test (POST) results. For Cisco IOS on the 2900/3500XL, 2950/2955, 3550, 2970 and 3750 series switches, the equivalent command is show post which displays the results of the switch POST.

Note: For Catalyst 3750, 3550, 2970 , 2950/2955, and 2900/3500XL Series switches use the show post command, which indicates a simple pass or fail for the hw status. Use the LEDs on these switches to help you understand the POST results.

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