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Time Domain Reflectometer (TDR)
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.
S4820T
Syntax
tdr-cable-test interface
Parameters
interface Enter the keyword TenGigabitEthernet 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,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
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 ExaScale.
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.
Interfaces
873