Internet Router Hardware Guide

Table of Contents
About This Guide
xix
Objectives ...........................................................................xix
Audience.............................................................................xix
Documentation Conventions ......................................................xix
List of Technical Publications......................................................xxi
Documentation Feedback........................................................ xxiii
Requesting Support...............................................................xxiii
Part 1
Product Overview
Chapter 1 System Overview .. 3
System Description...................................................................3
Field-Replaceable Units (FRUs) ......................................................4
System Redundancy..................................................................4
Safety Requirements, Warnings, and Guidelines...................................5
Chapter 2
Hardware Component Overview.. 7
Chassis.................................................................................7
Packet Forwarding Engine ..........................................................11
Midplane........................................................................ 12
Physical Interface Cards (PICs)................................................ 13
PIC Components ..........................................................14
Flexible PIC Concentrators (FPCs) ............................................ 14
FPC Components.......................................................... 16
FPC Types.................................................................. 17
Packet Forwarding Engine Clock Generators (PCGs) ........................ 18
PCG Components ......................................................... 19
Switching and Forwarding Module (SFM) .................................... 19
SFM Components ......................................................... 20
Host Module......................................................................... 22
Routing Engine................................................................. 23
Routing Engine Components............................................. 24
Miscellaneous Control Subsystem (MCS)..................................... 25
MCS Components ......................................................... 26
Craft Interface.......................................................................27
Alarm LEDs and Alarm Cutoff/Lamp Test Button............................ 28
LCD and Navigation Buttons..................................................29
LCD Idle Mode............................................................. 29
LCD Alarm Mode.......................................................... 30
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