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Table of Contents
About This Guide xvii
Objectives ....................................................................................................xvii
Audience .....................................................................................................xvii
Documentation Conventions ......................................................................xviii
List of Technical Publications ........................................................................xix
Obtaining Documentation ..........................................................................xxvi
Documentation Feedback ...........................................................................xxvi
Requesting Technical Support ....................................................................xxvii
Part 1 MX240 Router Overview
Chapter 1 Router Overview 3
Router Description ..........................................................................................3
Component Redundancy .................................................................................4
Chapter 2 Hardware Components 5
Router Chassis .................................................................................................5
Midplane .........................................................................................................8
Dense Port Concentrators (DPCs) ....................................................................8
DPC Components ...................................................................................10
Host Subsystem .............................................................................................11
Switch Control Board (SCB) .....................................................................11
SCB Slots ..........................................................................................12
SCB Redundancy ..............................................................................12
SCB Components ..............................................................................13
SCB LEDs .........................................................................................13
Routing Engine .......................................................................................14
Routing Engine Components ............................................................14
Routing Engine Interface Ports .........................................................16
Routing Engine Boot Sequence .........................................................16
Cable Management System ...........................................................................17
Craft Interface ...............................................................................................17
Alarm LEDs and Alarm Cutoff/Lamp Test Button ....................................18
Host Subsystem LEDs .............................................................................19
Power Supply LEDs .................................................................................19
DPC LEDs ...............................................................................................20
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