Cable diagnostics

NOTE: There are some limitations for cable diagnostics on the FS-108E, FS-124E, FS-108E-POE, FS-108E-FPOE, FS-124E-POE, FS-124E-FPOE, FS-148E, and FS-148E-POE models:

• Crosstalk cannot be detected.
• There is a 5-second delay before results are displayed.
• The value for the cable length is inaccurate.
• The results are inaccurate for open and short cables.

You can check the state of cables connected to a specific port. The following pair states are supported:

• Open
• Short
• Ok
• Open_Short
• Unknown
• Crosstalk

If no cable is connected to the specific port, the state is Open, and the cable length is 0 meters.

To see which models support this feature, refer to the FortiSwitch feature matrix.

Using the GUI:

1. Go to Switch > Port > Physical.
2. Select Cable Diagnostic for the appropriate port.
3. Select Continue to start the cable diagnostics.
   NOTE: Running cable diagnostics on a port that has the link up will interrupt the traffic for several seconds.
4. Select Back to Physical Ports to close the Cable Diagnostics window.

Using the CLI:

Use the following command to run a time domain reflectometry (TDR) diagnostic test on cables connected to a specific port:

diagnose switch physical-ports cable-diag <physical port name>

NOTE: Running cable diagnostics on a port that has the link up will interrupt the traffic for several seconds.

For example:

# diagnose switch physical-ports cable-diag port1

port1: cable (4 pairs, length +/- 10 meters)

pair A Open, length 0 meters

pair B Open, length 0 meters

pair C Open, length 0 meters

pair D Open, length 0 meters

Use the following command to check the medium dependent interface crossover (MDI-X) interface status for a specific port:

diagnose switch physical-ports mdix-status <physical port name>

For example:

# diagnose switch physical-ports mdix-status port1

port1: MDIX(Crossover)