PHY Diagnostics Commands 195
PHY Diagnostics Commands

test copper-port tdr

The
test copper-port tdr
Privileged EXEC mode command diagnoses with TDR (Time Domain
Reflectometry) technology the quality and characteristics of a copper cable attached to a 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
• The port under test should be conducted when the fiber link is down.
NOTE: The maximum distance VCT can function is 120 meters.
Examples
The following example results in a report on the cable attached to port g3.

show copper-ports tdr

The
show copper-ports tdr
Privileged EXEC mode command display the last TDR (Time Domain
Reflectometry) tests on specified ports.
Syntax
show copper-ports tdr
[
interface
]
•
interface
—A valid Ethernet port.
Default Configuration
This command has no default configuration.
Console# test copper-port tdr g3
Cable is open at 100 meters