show diagnostics tdr
Syntax show diagnostics tdr
<interface interface-name>
Release Information Command introduced in Junos OS Release 12.3X53 for ACX Series routers.
Description Display the results of a time domain reflectometry (TDR) diagnostic test run on an
interface. A TDR 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 ACX routers and interfaces:
• On ACX1000 routers, 4 RJ45 (Cu) ports or 8-port Gigabit Ethernet MICs with small
form-factor pluggable (SFP) transceivers and RJ45 connectors.
• On ACX1100 routers, 4-port or 8-port Gigabit Ethernet MICs with SFP transceivers and
RJ45 connectors.
• On ACX2000 routers, 8-port Gigabit Ethernet MICs with SFP transceivers and RJ45
connectors.
• On ACX2100 and ACX2200 routers, 4-port Gigabit Ethernet MICs with SFP transceivers
and RJ45 connectors.
• On ACX4000 routers, 4-port, 6-port, or 8-port Gigabit Ethernet MICs with SFP
transceivers and RJ45 connectors.
NOTE: TDR diagnostics are applicable for copper ports only and not for
optical fiber ports.
Use the request diagnostics tdr command to request a TDR test on a specified interface.
Use the show diagnostic tdr command to display the last TDR test results for a specified
interface or the last TDR test results for all network interfaces on the router that support
the TDR test.
Options none—Show summarized last results for all interfaces on the router that support the
TDR test.
interface interface-name—(Optional) Show detailed last results for the specified interface
or a range of interfaces. Specify a range of interfaces by entering the beginning and
ending interface in the range, separated by a dash—for example,
ge-0/0/15-ge-0/0/20.
Required Privilege
Level
view
2461Copyright © 2017, Juniper Networks, Inc.
Chapter 42: Operational Commands
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