Administrator Guide

Time Domain Reflectometer (TDR) Commands
TDR is useful for troubleshooting an interface that is not establishing a link; either it is flapping or not coming up at all. TDR detects open
or short conditions of copper cables on 100/1000 Base-T modules.
Important Points to Remember
• The interface and port must be enabled (configured—refer to the interface command) before running TDR. An error message is
generated if you have not enabled the interface.
• The interface on the far-end device must be shut down before running TDR.
• Because TDR is an intrusive test on an interface that is not establishing a link, do not run TDR on an interface that is passing traffic.
• When testing between two devices, do not run the test on both ends of the cable.
tdr-cable-test
Test the condition of copper cables on 100/1000 Base-T modules.
Syntax
tdr-cable-test interface
Parameters
interface Enter the keyword TenGigabitEthernet or peGigE then the slot/port information
for the 100/1000 Ethernet interface.
Defaults None
Command Modes EXEC
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.9(0.0) Introduced on the C9010.
9.8(2.0) Introduced on the S3100 series.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7.0.0 Introduced on the S5000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.2.1.0 Introduced on the E-Series.
7.7.1.0 Introduced on the S Series.
7.6.1.0 Introduced on the C-Series.
6.1.1.0 Introduced on the E-Series.
Usage Information The interface must be enabled to run the test or an error message is generated:
Dell# tdr-cable-test tengigabitethernet 11/1
% Error: Interface is disabled Te 11/1.
Syslog messages are generated when the link flaps during TDR tests.
In a dual homing setup, you can use this command only from the primary VLT peer.
Interfaces 759