Reference Guide

Template Last Updated - 2/7/2007 PHY Diagnostics Commands 381
DELL CONFIDENTIAL – PRELIMINARY 5/21/14 - FOR PROOF ONLY
21
PHY Diagnostics Commands
NOTE: Some CLI commands or parameters described below are not applicable for
fiber ports. Refer to Port Features.
test cable-diagnostics tdr
Use the test cable-diagnostics tdr Privileged EXEC mode command to use
Time Domain Reflectometry (TDR) technology to diagnose the quality and
characteristics of a copper cable attached to a port.
Syntax
test cable-diagnostics tdr interface interface-id
Parameters
interface-id—Specifies an Ethernet port ID.
Command Mode
Privileged EXEC mode
User Guidelines
This command does not work on fiber ports (if they exist on the device). The
port to be tested should be shut down during the test, unless it is a
combination port with fiber port active. In this case, it does not need to be
shut down, because the test does not work on fiber ports.
The maximum length of cable for the TDR test is 120 meters.
Example
Example 1 - Test the copper cables attached to port 1 (a copper port).
console# test cable-diagnostics tdr interface gi0/1
Cable is open at 64 meters