Chapter 19 Cable Diagnostics; Virtual Cable Testing; Cable Diagnostics - HP Aruba JL253A Management And Configuration Manual

The Time Domain Reflectometry (TDR) or Cable Diagnostics is a port feature supported on some switches
running ArubaOS-Switch software. TDR is used to detect cable faults on 100BASE-TX and 1000BASE-T ports.

Virtual cable testing

The Virtual Cable Test (VCT) uses the same command as TDR. It is applicable only for GigT transceivers like
copper transceiver (J8177C–ProCurve Gigabit 1000Base-T Mini-GBIC). The VCT test results include distance to
the fault, but not the cable length.

Cable Diagnostics

Syntax
test cable-diagnostics <PORT-LIST>
Description
Use the command to test for cable faults.
Option
PORT-LIST
Specify copper port as a input port number.
Test cable-diagnostics C21
test cable-diagnostics C21
The 'test cable-diagnostics' command will cause a loss of link and will take a few seconds per interface to complete.
Continue [Y/N]? y
MDI Cable
Port Pair Status
--------- ------
C21 1-2 Open
3-6 Open
4-5 Open
7-8 Open
Test cable-diagnostics 1/1-1/10
switch# test cable-diagnostics 1/1-1/10
This command will cause a loss of link on all tested ports and will take
several seconds per port to complete.
the results.
Continue (y/n)? Y
switch# show cable-diagnostics 1/1-1/10
Cable Diagnostic Status - Copper Ports
MDI
Port Pair

Chapter 19 Cable Diagnostics

Distance Pair Pair
to Fault Skew Polarity
-------- ----- ------
0 m 0 ns
0 m 0 ns
0 m 0 ns
1 m 0 ns
Cable Cable Length or
Status Distance to Fault
MDI
Mode
------
Use the 'show cable-diagnostics' command to view
Chapter 19
Cable Diagnostics
643