TDR or similar cable test diagnostics

[Eduardo_Mendiza]

Hello everyone,

I would like to know if the summit series has any TDR functionalities or similiar failure detection features on copper cables. I know the summit series has a run diagnostics command, but, from what I've read, it only tests ASIC and packet loopback.

Cheers.

Ed

[Drew_C]

I've been trying to get it added to the standard CLI for a while. When 22.3 comes out, I might have a trick to share with you... 😉
Thanks for reporting the bug.

[Eduardo_Mendiza]

Thanks for the answer Dave. That solves my doubt.

Ed

[Dave_Hammers]

Starting with EXOS 21.1.2, the cablediag application is bundled in with EXOS.
Known issues:

• Disruptive test: momentarily interrupts data on a link
• Disrupts stacking if run on alternative stack link ports

# run script cablediag.py -h
usage: cablediag [-h] [-s SLOT [SLOT ...]] [-p PORT [PORT ...]] [-d]

optional arguments:
-h, --help show this help message and exit
-s SLOT [SLOT ...], --slot SLOT [SLOT ...]
Stacking slot number, e.g. 1,2 or 1-5
-p PORT [PORT ...], --port PORT [PORT ...]
Selected port number, e.g. 3,4,5 or 3-5
-d, --debug Enable debug

E.g.
# run script cablediag.py -p 2
cablediag: 1.0.0.1

Collecting port cable diagnostic information may take a moment...

port 2: cable (4 pairs, length +/- 10 meters)
pair A Ok, length 0 meters
pair B Ok, length 0 meters
pair C Ok, length 0 meters
pair D Ok, length 0 meters

E.g.
# run script cablediag.py
cablediag: 1.0.0.1

Collecting port cable diagnostic information may take a moment...

port 1: 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
port 2: cable (4 pairs, length +/- 10 meters)
pair A Ok, length 0 meters
pair B Ok, length 0 meters
pair C Ok, length 0 meters
pair D Ok, length 0 meters
port 3: 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
...

port 23: 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
port 24: 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
CABLEdiag: ERROR: port 25: Feature unavailable
CABLEdiag: ERROR: port 26: Feature unavailable
CABLEdiag: ERROR: port 27: Feature unavailable
CABLEdiag: ERROR: port 28: Feature unavailable
CABLEdiag: ERROR: port 29: Feature unavailable
CABLEdiag: ERROR: port 30: Feature unavailable
CABLEdiag: ERROR: port 31: Feature unavailable
CABLEdiag: ERROR: port 32: Feature unavailable
CABLEdiag: ERROR: port 33: Feature unavailable
CABLEdiag: ERROR: port 34: Feature unavailable

[Stephane_Grosj1]

Ah, it made its way to 21.1.2! Good to hear.