Test Cable-Diagnostics Tdr - Cisco Catalyst 2960 Command Reference Manual

Chapter 2 Catalyst 3750 Switch Cisco IOS Commands

test cable-diagnostics tdr

Use the test cable-diagnostics tdr privileged EXEC command to run the Time Domain Reflector (TDR)
feature on an interface.
Syntax Description
interface-id
Defaults There is no default.
Command Modes
Privileged EXEC
Command History Release
12.2(25)FX
Usage Guidelines
TDR is supported only on 10/100 and 10/100/1000 copper Ethernet ports. It is not supported on SFP
module ports. For more information about TDR, see the 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.
Examples 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 Mb/s, 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.
Related Commands Command
show cable-diagnostics tdr
OL-8604-03
test cable-diagnostics tdr interface interface-id
Specify the interface on which to run TDR.
Modification
This command was introduced.
Description
Displays the TDR results.
Catalyst 2960 Switch Command Reference
test cable-diagnostics tdr
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