M160 Internet Router Hardware Guide
the master and which is in standby mode (and so performs no functions). By
default, the Routing Engine in the slot labeled
RE0
is the master. The master
Routing Engine also determines which of the two PCGs is the master.
The Routing Engine is hot-pluggable, as described in Field-Replaceable
Units (FRUs) on page 4. For information about the effect of removing a
Routing Engine, see Host Module on page 22. For replacement instructions,
see “Replacing a Routing Engine” on page 165.
Routing Engine Components
The Routing Engine (shown in Figure 9) is a two-board system
with the following components:
CPU—Runs JUNOS Internet software to maintain the router’s routing tables
and routing protocols. It has a Pentium-class processor.
SDRAM—Provides storage for the routing and forwarding tables and for other
Routing Engine processes.
Compact flash drive—Provides primary storage for software images,
configuration files, and microcode. The drive is fixed and inaccessible from
outside the router.
Hard disk—Provides secondary storage for log files, memory dumps, and
rebooting the system if the flash drive fails.
PC card slots—Accept removable PC cards, which store software images
for system upgrades.
LED—Indicates disk activity for the internal IDE interface. It does not
necessarily indicate routing-related activity.
Interfaces for out-of-band management access—Provide information about
Routing Engine status to devices (console, laptop, or terminal server) that can
be attached to access ports located on the Connector Interface Panel (CIP).
EEPROM—Stores the serial number of the Routing Engine.
Reset button—Reboots the Routing Engine when pressed.
NOTE:
The LEDs that report host module status (and by implication Routing Engine
status) are on the craft interface rather than the Routing Engine faceplate. For more
information, see “Host Module LEDs” on page 31.
NOTE:
The appearance and position of electronic components or the PC card
slot on your Routing Engine might differ from Figure 9 and other figures in this
24
Host Module
Summary of Contents for Internet Router M160
Page 12: ...M160 Internet Router Hardware Guide xii Table of Contents ...
Page 16: ...M160 Internet Router Hardware Guide xvi List of Figures ...
Page 18: ...M160 Internet Router Hardware Guide xviii List of Tables ...
Page 24: ...M160 Internet Router Hardware Guide xxiv Requesting Support ...
Page 26: ...2 Product Overview ...
Page 30: ...M160 Internet Router Hardware Guide 6 Safety Requirements Warnings and Guidelines ...
Page 66: ...M160 Internet Router Hardware Guide 42 Cable Management System ...
Page 80: ...M160 Internet Router Hardware Guide 56 Routing Engine Architecture ...
Page 82: ...58 Initial Installation ...
Page 104: ...M160 Internet Router Hardware Guide 80 Unpacking the Router ...
Page 148: ...M160 Internet Router Hardware Guide 124 Configuring the JUNOS Internet Software ...
Page 150: ...126 Hardware Maintenance Replacement and Troubleshooting Procedures ...
Page 242: ...M160 Internet Router Hardware Guide 218 Troubleshooting the Power System ...
Page 244: ...220 Appendixes ...
Page 292: ...M160 Internet Router Hardware Guide 268 Packing Components for Shipment ...
Page 301: ...Part 5 Index Index 277 ...
Page 302: ...278 Index ...