Time Domain Reflectometer (Tdr); Important Points To Remember - Dell Force10 MXL Blade Reference Manual

Time Domain Reflectometer (TDR)

Important Points to Remember

tdr-cable-test
Syntax
Parameters
Defaults
Command Modes
Command
History
Usage
Information
Related
Commands
show tdr
Syntax
284 | Interfaces
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
• The interface and port must be enabled (configured—see the
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.
Test the condition of copper cables on 100/1000 Base-T modules.
tdr-cable-test interface
interface
none
EXEC
Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module
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
show tdr
Display the TDR test results.
show tdr interface
GigabitEthernet
Enter the keyword Ten
information for the 100/1000 Ethernet interface.
Displays the results of the TDR test.
interface command) before running
followed by the slot/port