Request Diagnostics Tdr - Juniper EX2200 Hardware Manual

Network Interfaces for EX4300 Switches

request diagnostics tdr

Syntax
Release Information
Description
Options
Required Privilege
Level
Related
Documentation
List of Sample Output
Output Fields
252
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, EX3200, EX3300, and EX4200 switches—RJ-45 network interfaces. The TDR
test is not supported on management interfaces and SFP interfaces.
EX6200 and EX8200 switches—RJ-45 interfaces on line cards.
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
—Stop the TDR test currently in progress on the specified interface. No results are
abort
reported, and previous results, if any, are cleared.
—The name of the interface.
interface-name
start —Start a TDR test on the specified interface.
maintenance
show diagnostics tdr on page 254
Diagnosing a Faulty Twisted-Pair Cable (CLI Procedure) on page 332
request diagnostics tdr start interface ge-0/0/19 on page 253
Table 44 on page 253 lists the output fields for the
Output fields are listed in the approximate order in which they appear.
show diagnostics tdr command.
request diagnostics tdr
Copyright © 2015, Juniper Networks, Inc.
command.