FortiSwitch
FortiSwitch: secure, simple and scalable Ethernet solutions
DW_FTNT
Staff
Staff
Article Id 239242
Description This article describes how to troubleshoot physical issues on Fortiswitch Port. Errors will point to bad port/cable/transceiver or some physical issue.
Scope FortiSwitch, FortiGate.
Solution

Commands on FortiGate:

 

diag switch-controller switch-info port-stats <switch serial number> portxx

 

Look for incrementing errors and run the command over and over.

 

Commands on FortiSwitch:

 

diag switch physical-ports port-stats list (port number)

 

Look for incrementing errors and CRC errors and run the command over and over.

 

FortiGate:

 

diagnose switch-controller switch-info port-stats S224FSWITCH port23

 

Look for incrementing errors.

 

FortiSwitch:

 

diag switch physical-ports port-stats list 23

 

Look for incrementing errors and CRC errors.

 

Checking Physical layer on FortiSwitch:

 

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

 

The results can be one of the following:

  • Open: Indicates that there is an open circuit in the cable, meaning the connection is broken or incomplete.
  • Short: Indicates a short circuit in the cable, where two conductors are unintentionally connected.
  • Ok: Indicates that the cable is functioning correctly without any issues.
  • Open_Short: Indicates a combination of both an open circuit and a short circuit in the cable.
  • Unknown: Indicates that the diagnostic test could not determine the state of the cable.
  • Crosstalk: This result cannot be detected on certain FortiSwitch models and refers to unwanted transfer of signals between communication channels.

 

Example:

 

SW01-ASPER # diagnose switch physical-ports cable-diag port29
( Please wait ... )

port29: cable (4 pairs, length +/- 25 meters)
pair A Short, length 0 meters
pair B Short, length 0 meters 
pair C Ok, length 12 meters
pair D Ok, length 12 meters