In some Cisco switches, you can test your cables for faults just like a TDR. Here is an example. Sections in blue are what you would type:
am-02-01>test cable tdr interface g1/0/1
Link state may be affected during TDR test
TDR test started on interface Gi1/0/1
A TDR test can take a few seconds to run on an interface
Use ‘show cable-diagnostics tdr’ to read the TDR results.
am-02-01>show cable-diagnostics tdr int g1/0/1
TDR test last run on: December 19 21:49:19
Interface Speed Local pair Pair length Remote pair Pair status
——— —– ———- —————— ———– ——————–
Gi1/0/1 100M Pair A N/A Pair B Normal
Pair B N/A Pair A Normal
Pair C 78 +/- 1 meters N/A Short/Impedance Mism
Pair D 76 +/- 1 meters N/A Short/Impedance Mism
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