Hardware Component Overview
For further safety information, see “Safety and Regulatory Compliance Information”
on page 221.
Table 5 summarizes physical specifications for the router chassis.
Table 5: Chassis Physical Specifications
Description
Value
Chassis height
35 in. (89 cm)
Chassis width
17.5 in. (44.5 cm) for sides of chassis
19 in. (48.3 cm) with front support posts and center-mounting brackets
Chassis depth
29 in. (73.6 cm)
Weight,
maximum
configuration
370.5 lb (168 kg)
Weight,
minimum
configuration
190 lb (86 kg)
Thermal output
9400 BTU/hour
Packet Forwarding Engine
The Packet Forwarding Engine is a multicomponent system that uses
application-specific integrated circuits (ASICs) to perform Layer 2 and Layer 3
packet switching, route lookups, and packet forwarding. The ASICs include the
Distributed Buffer Manager ASIC, Internet Processor II ASIC, I/O Manager ASIC,
Packet Director ASIC, and media-specific controller ASICs.
The Packet Forwarding Engine has the following components:
Midplane—Physically separates front and rear cavities inside the chassis,
distributes power from the power supplies, and transfers packets and signals
between router components, which plug into it.
Physical Interface Card (PIC)—Physically connects the router to network media
such as OC-12/STM-4, OC-48/STM-16, Ethernet, and channelized interfaces.
PICs are housed in Flexible PIC Concentrators (FPCs). (Quad-wide PICs, such
as the OC-192/STM-64 SONET/SDH PIC, are exceptions. Such PICs occupy
Packet Forwarding Engine
11
Содержание Internet Router M160
Страница 12: ...M160 Internet Router Hardware Guide xii Table of Contents ...
Страница 16: ...M160 Internet Router Hardware Guide xvi List of Figures ...
Страница 18: ...M160 Internet Router Hardware Guide xviii List of Tables ...
Страница 24: ...M160 Internet Router Hardware Guide xxiv Requesting Support ...
Страница 26: ...2 Product Overview ...
Страница 30: ...M160 Internet Router Hardware Guide 6 Safety Requirements Warnings and Guidelines ...
Страница 66: ...M160 Internet Router Hardware Guide 42 Cable Management System ...
Страница 80: ...M160 Internet Router Hardware Guide 56 Routing Engine Architecture ...
Страница 82: ...58 Initial Installation ...
Страница 104: ...M160 Internet Router Hardware Guide 80 Unpacking the Router ...
Страница 148: ...M160 Internet Router Hardware Guide 124 Configuring the JUNOS Internet Software ...
Страница 150: ...126 Hardware Maintenance Replacement and Troubleshooting Procedures ...
Страница 242: ...M160 Internet Router Hardware Guide 218 Troubleshooting the Power System ...
Страница 244: ...220 Appendixes ...
Страница 292: ...M160 Internet Router Hardware Guide 268 Packing Components for Shipment ...
Страница 301: ...Part 5 Index Index 277 ...
Страница 302: ...278 Index ...