Using The Cli - TP-Link Jetstream T1500G-8T User Manual

Diagnosing the Device & Network
1.2

Using the CLI

On privileged EXEC mode or any other configuration mode, you can use the following
command to check the connection status of the cable that is connected to the switch.
show cable-diagnostics interface { fastEthernet port | gigabitEthernet port | ten-gigabitEthernet port }
View the cable diagnostics of the connected Ethernet Port.
port :
show cable-diagnostics careful interface { fastEthernet port | gigabitEthernet port | ten-gigabitEthernet
port }
View the cable diagnostics of the connected Ethernet Port. When taking the careful cable test, the switch
will only test the cable for the port which is in the link-down status.
port :
The following example shows how to check the cable diagnostics of port 1/0/2:
Switch#show cable-diagnostics interface gigabitEhternet 1/0/2
Port
Gi1/0/2 Pair-A Normal
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Status Displays the cable status. Test results include normal, closed, open and crosstalk.
Normal : The cable is connected normally.
Closed: A short circuit is being caused by abnormal contact of wires in the cable.
Open: No device is connected to the other end or the connection is broken.
Crosstalk: Impedance mismatch due to the poor quality of the cable.
Length If the connection status is normal, the length range of the cable is displayed.
Fault Location If the connection status is short, close or crosstalk, here displays the length from
the port to the trouble spot.
Enter the port number in 1/0/1 format to check the result of the cable test.
Enter the port number in 1/0/1 format to check the result of the cable test.
Pair Status
Pair-B Normal
Pair-C Normal
Pair-D Normal
search engine
Length Error
2 (+/- 10m) ---
2 (+/- 10m) ---
0 (+/- 10m) ---
2 (+/- 10m) ---
Diagnosing the Device
User Guide 815