Juniper ACX2000 Configuration Guide

NOTE: We recommend running the TDR test on an interface when there is
no traffic on the interface.
TDR diagnostics are applicable for copper ports only and not for optical fiber
ports.
To diagnose a cable problem by running the TDR test:
1. Run the request diagnostics tdr command.
user@host> request diagnostics tdr start interface ge-0/0/10
Interface TDR detail:
Test status : Test successfully executed ge-0/0/10
2. View the results of the TDR test with the show diagnostics tdr command.
user@host> show diagnostics tdr interface ge-0/0/10
Interface TDR detail:
Interface name : ge-0/0/10
Test status : Passed
Link status : Down
MDI pair : 1-2
Cable status : Normal
Distance fault : 0 Meters
Polartiy swap : N/A
Skew time : N/A
MDI pair : 3-6
Cable status : Normal
Distance fault : 0 Meters
Polartiy swap : N/A
Skew time : N/A
MDI pair : 4-5
Cable status : Open
Distance fault : 1 Meters
Polartiy swap : N/A
Skew time : N/A
MDI pair : 7-8
Cable status : Normal
Distance fault : 0 Meters
Polartiy swap : N/A
Skew time : N/A
Channel pair : 1
Pair swap : N/A
Channel pair : 2
Pair swap : N/A
Downshift : N/A
3. Examine the Cable status field for the four MDI pairs to determine if the cable has a
fault. In the preceding example, the twisted pair on pins 4 and 5 is broken or cut at
approximately one meter from the ge-0/0/10 port connection.
1331Copyright © 2017, Juniper Networks, Inc.
Chapter 36: Diagnosing Cable States Using Time Domain Reflectometry (TDR)

Juniper ACX2000 Specifications

General

Brand	Juniper
Model	ACX2000
Category	Network Router
Language	English