Dell Force10 MXL Blade - Time Domain Reflectometer (TDR)

284 | Interfaces
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Time Domain Reflectometer (TDR)
Time domain reflectormeter (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.
• tdr-cable-test
• show tdr
Important Points to Remember
• The interface and port must be enabled (configured—see 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
Defaults
none
Command Modes
EXEC
Command
History
Usage
Information
The interface must be enabled to run the test or an error message is generated:
FTOS#tdr-cable-test tengigabitethernet 5/2
%Error: Interface is disabled TenGIG 5/2
Related
Commands
show tdr
Display the TDR test results.
Syntax
show tdr interface
interface
Enter the keyword TenGigabitEthernet followed by the slot/port
information for the 100/1000 Ethernet interface.
Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module
show tdr Displays the results of the TDR test.