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ManualsBrandsCisco ManualsComputer equipmentME 3400
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Cisco ME 3400 Ethernet Access Switch Command Reference
OL-9640-07
Chapter 2 Cisco ME 3400 Ethernet Access Switch Cisco IOS Commands
test cable-diagnostics tdr
test cable-diagnostics tdr
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
Note TDR is supported only on the copper Ethernet 10/100 or 10/100/100 ports on the Cisco ME switch. This
includes dual-purpose ports on the ME 3400-12CS or ME 3400-2CS switches that are configured as
10/100/1000 ports by using the RJ-45 connector.
Syntax Description
Defaults There is no default.
Command Modes Privileged EXEC
Command History
Usage Guidelines You can use the TDR feature to diagnose and resolve cabling problems. TDR is supported only on copper
Ethernet 10/100 or 10/100/1000 ports. It is not supported on 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 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.
interface-id Specify the interface on which to run TDR.
Release Modification
12.2(25)EX This command was introduced.