Chapter 11
| Interface Commands
Cable Diagnostics
– 449 –
Transceiver-threshold-auto : Enabled
Low Alarm Low Warning High Warning High Alarm
----------- ------------ ------------ ------------ ------------
Temperature(Celsius) -123.00 0.00 70.00 75.00
Voltage(Volts) 3.10 3.15 3.45 3.50
Current(mA) 6.00 7.00 90.00 100.00
TxPower(dBm) -12.00 -11.50 -9.50 -9.00
RxPower(dBm) -21.50 -21.00 -3.50 -3.00
Console#
Cable Diagnostics
test cable-diagnostics This command performs cable diagnostics on the specified port to diagnose any
cable faults (short, open, etc.) and report the cable length.
Syntax
test cable-diagnostics interface interface
interface
ethernet unit/port
unit - Unit identifier. (Range: 1-8)
port - Port number. (ECS4620-28F/28F-DC: 23-24,
Other models: 1-24/48)
Command Mode
Privileged Exec
Command Usage
â—† Cable diagnostics are performed using Digital Signal Processing (DSP) test
methods. DSP analyses the cable by sending a pulsed signal into the cable, and
then examining the reflection of that pulse.
â—† This cable test is only accurate for Ethernet cables 7 - 100 meters long.
â—† The test takes approximately 5 seconds. Use the show cable-diagnostics
command to display the results of the test, including common cable failures, as
well as the status and approximate length of each cable pair.
â—† Ports are linked down while running cable diagnostics.
â—† To ensure more accurate measurement of the length to a fault, first disable
power-saving mode (using the no power-save command) on the link partner
before running cable diagnostics.
Example
Console#test cable-diagnostics interface ethernet 1/24
Console#
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