Symptom
IOS: 16.12.03a
ROM: IOS-XE ROMMON
Version 16.12.2r
02S0409F#show cable-diagnostic TDR interface g1/0/34
TDR test last run on January 27 21:25:41
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/34 1000M Pair A N/A Pair B Normal
Pair B N/A Pair A Normal
Pair C N/A Pair D Normal
Pair D N/A Pair C Normal
LAB RE-PRO:
==========
We see the exact issue in our lab:
IOS: 16.12.3a
Switch#show cable-diagnostics tdr interface gigabitEthernet 1/0/7
TDR test last run on: February 09 06:53:12
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/7 1000M Pair A N/A Pair A Normal >>>>> Length is not displayed.
Pair B N/A Pair B Normal
Pair C N/A Pair C Normal
Pair D N/A Pair D Normal
16.12.4—Issue is not seen.
Switch#show cable-diagnostics tdr interface gigabitEthernet 1/0/7
TDR test last run on: February 09 07:15:24
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/7 1000M Pair A 0 +/- 10 meters Pair A Normal >> We can see the length.
Pair B 0 +/- 10 meters Pair B Normal
Pair C 0 +/- 10 meters Pair C Normal
Pair D 0 +/- 10 meters Pair D Normal
