Phy Diagnostics Commands; Test Cable-Diagnostics Tdr - Cisco 300 Series Cli Manual

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PHY Diagnostics Commands

OL-32830-01 Command Line Interface Reference Guide

To use Time Domain Reflectometry (TDR) technology to diagnose the quality and

characteristics of a copper cable attached to a port, use the test

cable-diagnostics tdr Privileged EXEC mode command.

test cable-diagnostics tdr interface

interface-id—(Optional) 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.

- Test the copper cables attached to port gi 1 1 (a copper port).

switchxxxxxx#

test cable-diagnostics tdr interface gi1

Cable is open at 64 meters

interface-id