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Juniper M120 User Manual

Juniper M120
382 pages
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Table of Contents
About the Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi
Documentation and Release Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi
Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi
Documentation Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiii
Requesting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiv
Self-Help Online Tools and Resources . . . . . . . . . . . . . . . . . . . . . . . . . . xxiv
Opening a Case with JTAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiv
Part 1 Overview
Chapter 1 System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
M120 Router Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
M120 Component Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2 M120 Router Release Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Outstanding Issues with the M120 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Errata with the M120 Router Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 3 Chassis Components and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
M120 Router Chassis Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
M120 Midplane Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
M120 Cable Management System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
M120 Craft Interface Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Craft Interface Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
M120 Alarm Relay Contacts on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . 12
M120 External Clock Interface Ports on the Craft Interface . . . . . . . . . . . . . . . 12
M120 Routing Engine Interface Ports and Status Indicators . . . . . . . . . . . . . . 12
M120 Alarm LEDs and Alarm Cutoff/Lamp Test Button . . . . . . . . . . . . . . . . . . . . . 13
M120 Component LEDs on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Host Subsystem LEDs on the M120 Craft Interface . . . . . . . . . . . . . . . . . . . . . 14
Ethernet Port LEDs on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
FEB LEDs on the M120 Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
FPC LEDs on the M120 Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Supply LEDs on the M120 Craft Interface . . . . . . . . . . . . . . . . . . . . . . . 15
External Clocking Inputs LEDs on the M120 Craft Interface . . . . . . . . . . . . . . . 15
M120 External Clock Interface Ports on the Craft Interface . . . . . . . . . . . . . . . . . . 16
M120 Alarm Relay Contacts on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . 17
Chapter 4 Cooling System Components and Descriptions . . . . . . . . . . . . . . . . . . . . . . . 19
M120 Cooling System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
iiiCopyright © 2018, Juniper Networks, Inc.

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Juniper M120 Specifications

General IconGeneral
BrandJuniper
ModelM120
CategoryNetwork Router
LanguageEnglish

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