Cisco Cisco Gigabit Ethernet Switch Module (CGESM) for HP Technical References

Use the test cable-diagnostics tdr privileged EXEC command to run the Time Domain Reflector (TDR) 
feature on an interface. 

test cable-diagnostics tdr interface interface-id 

There is no default.

Privileged EXEC 

TDR is supported only on 10/100/1000 copper Ethernet ports. It is not supported on SFP module ports. 
For more information about TDR, see the Cisco Gigabit Ethernet Switch Module for HP p-Class 
BladeSystem Software Configuration Guide for this release.

After you run TDR by using the test cable-diagnostics tdr interface interface-id command, use the 
show cable-diagnostics tdr interface interface-id privileged EXEC command to display the results.

This example shows how to run TDR on an interface:

Switch# test cable-diagnostics tdr interface gigabitethernet0/2

TDR test started on interface Gi0/2

A TDR test can take a few seconds to run on an interface

Use 'show cable-diagnostics tdr' to read the TDR results.

If you enter the test cable-diagnostics tdr interface interface-id command on an interface that has a 
link status of up and a speed of 10 or 100 Mbps, these messages appear:

Switch# test cable-diagnostics tdr interface gigabitethernet0/3

TDR test on Gi0/9 will affect link state and traffic

TDR test started on interface Gi0/3

A TDR test can take a few seconds to run on an interface

Use 'show cable-diagnostics tdr' to read the TDR results.

Specify the interface on which to run TDR.

12.2(25)SE1

This command was introduced.

Displays the TDR results.