Test Cable-Diagnostics Tdr - Cisco Catalyst 3750 Command Reference Manual

test cable-diagnostics tdr

test cable-diagnostics tdr
Use the test cable-diagnostics tdr privileged EXEC command on the switch stack or on a standalone
switch 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
12.1(19)EA1
Usage Guidelines You can use the TDR feature to diagnose and resolve cabling problems. TDR is supported only on copper
Ethernet 10/100/1000 ports. It is not supported on 10/100 ports or small form-factor pluggable (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 gigabitethernet1/0/2
TDR test started on interface Gi1/0/2
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 gigabitethernet1/0/3
TDR test on Gi1/0/9 will affect link state and traffic
TDR test started on interface Gi1/0/3
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
Catalyst 3750 Switch Command Reference
2-596
test cable-diagnostics tdr interface interface-id
Specify the interface on which to run TDR.
Modification
This command was introduced.
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
Description
Displays the TDR results.
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