Request Diagnostics Tdr - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Complete Software Guide for Junos

request diagnostics tdr

Syntax
Release Information
Description
Options
Required Privilege
Level
Related
Documentation
List of Sample Output
Output Fields
1438
®
OS for EX Series Ethernet Switches, Release 10.4
request diagnostics tdr (abort | start) interface interface-name
Command introduced in Junos OS Release 9.0 for EX Series switches.
Start a time domain reflectometry (TDR) diagnostic test on the specified interface. This
test characterizes and locates faults on twisted-pair Ethernet cables. For example, it can
detect a broken twisted pair and provide the approximate distance to the break. It can
also detect polarity swaps, pair swaps, and excessive skew.
The TDR test is supported on the following switches and interfaces:
EX2200 switches—RJ-45 network interfaces. The TDR test is not supported on
management interfaces and SFP interfaces.
EX3200 and EX4200 switches—RJ-45 network interfaces. The TDR test is not supported
on management interfaces and SFP interfaces.
EX8200 switches—Interfaces on the 48-port RJ-45 line card.
NOTE: We recommend running the TDR test when there is no traffic on the
interface under test.
You view the results of the TDR test with the
abort —Stop the TDR test currently in progress on the specified interface. No results are
reported, and previous results, if any, are cleared.
—The name of the interface.
interface-name
—Start a TDR test on the specified interface.
start
maintenance
show diagnostics tdr on page 1440
Diagnosing a Faulty Twisted-Pair Cable (CLI Procedure) on page 1359
request diagnostics tdr start interface ge-0/0/19 on page 1439
Table 212 on page 1439 lists the output fields for the
Output fields are listed in the approximate order in which they appear.
command.
show diagnostics tdr
request diagnostics tdr
Copyright © 2010, Juniper Networks, Inc.
command.