08-19-2009 04:35 PM - edited 03-06-2019 07:20 AM
Folks, given two switchports from different switches connected to each other, is there any way to detect pins/wiring is wrong based on output of 'show controller' or another IOS command?
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08-19-2009 06:56 PM
Depending on the model of the appliance, you can also use the Time Delay Reflectometer (TDR) cable test.
test cable-diagnostics tdr command reference
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.1_19_ea1/command/reference/cli2.html#wp2253269
Hope this works.
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08-19-2009 06:35 PM
wiring / pins wrong can be detected in the show ip interface brief. If an interface shows down / down, that means you have a cabling issue.
If the link shows up, it means layer 1 is OK.
08-19-2009 07:26 PM
Well, in the case today I witnessed that the logic "interface down/down = layer 1 issue" did not work. It appeared as :
FastEthernet3/2 is up, line protocol is down (notconnect)
and the thing was definitely a bad cable.
08-19-2009 07:27 PM
interesting i've never seen that before. what version of code are you running?
08-19-2009 09:53 PM
Thanks for the rating.
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