FortiSwitch Cable Diagnostics (TDR)
How to run a cable diagnostic test using a FortiSwitch, either managed by a FortiGate or individually:
Managed FortiSwitch:
1
2
3
4
5
6
exe switch-controller switch-action cable-diag <FortiSwitch SN> <port>
port<#>: cable (4 pairs, length +/- 10 meters)
pair A Ok, length 20 meters
pair B Ok, length 22 meters
pair C Ok, length 22 meters
pair D Ok, length 20 meters
Individual FortiSwitch:
1
2
3
4
5
6
dia switch physical-ports cable-diag <port>
port<#>: cable (4 pairs, length +/- 10 meters)
pair A Ok, length 20 meters
pair B Ok, length 22 meters
pair C Ok, length 22 meters
pair D Ok, length 20 meters
The slight difference in length of the pairs you see in my example are due to the twists within the physical cable. All 4 of the pairs are twisted differently/unequal, this helps reduce crosstalk/interference.
This post is licensed under CC BY 4.0 by the author.