Section 13. PHY Diagnostics Commands
test copper-port tdr
The test copper-port tdr Privileged EXEC mode command uses Time Domain Reflectometry (TDR) technology
to diagnose the quality and characteristics of a copper cable attached to a port.
Syntax
test copper-port tdr interface
Parameters
•
interface — A valid Ethernet port. (Full syntax: port)
Default Configuration
This command has no default configuration.
Command Mode
Privileged EXEC mode
User Guidelines
The port to be tested should be shut down during the test, unless it is a combination port with fiber port active.
The maximum length of the cable for the TDR test is 120 meter.
Examples
The following example results in a report on the cable attached to port 3.
Console#
test copper-port tdr
3
Cable is open at 64 meters
Console#
test copper-port tdr
3
Can’t perform this test on fiber ports
TL-SG3109/TL-SL3428/TL-SL3452 Gigabit Managed Switch Family CLI Reference Guide
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