Administrator Guide

Switch Management Commands 2011
test copper-port tdr
Use the test copper-port tdr command in Privileged Exec mode to diagnose
with Time Domain Reflectometry (TDR) technology the quality and
characteristics of a copper cable attached to a 1GBaseT or 10GBaseT port.
Syntax
test copper-port tdr interface
• interface — A valid Ethernet port.
Default Configuration
This command has no default configuration.
Command Mode
Privileged Exec mode
User Guidelines.
This command prompts the user to shut down the port for the duration of
the test. Passive or active direct attach SFP/SFP+ cables are not based on
1000BaseT technology and do not support TDR testing. Use the show
copper-ports tdr command to view the test results.
The maximum distance the Virtual Cable Tester (VCT) can measure is 120 meters.
Examples
The following example results in a report on the cable attached to port 1/0/3.
console#test copper-port tdr te1/0/1
This command takes the port offline to measure the cable length.
Use the show copper-port tdr command to view the results..
Do you wish to continue and take the port offline (Y/N)?y
The following example results in a failure to report on the cable attached to
port te2/0/3.
console#test copper-port tdr te2/0/3
Can’t perform the test on fiber ports
2CSNXXX_SWUM204.book Page 2011 Monday, January 25, 2016 1:25 PM