Juniper T640 Hardware Manual page 72

T640 Core Router Hardware Guide
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CPU—Runs Junos OS 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.
CompactFlash card—Provides primary storage for software images, configuration files,
and microcode. The fixed CompactFlash card is inaccessible from outside the router.
Hard disk—Provides secondary storage for log files, memory dumps, and rebooting the
system if the CompactFlash card fails.
EEPROM—Stores the serial number of the Routing Engine.
Interfaces for management access—Provide information about Routing Engine status
to devices (console, laptop, or terminal server) connected to ports located on the
Connector Interface Panel (CIP).
Figure 18: Routing Engine 600
The faceplate of the Routing Engine 600 contains the following:
One PC Card slot—Accepts a removable PC Card, which stores software images for
system upgrades.
A slot labeled
PC CARD
defined in the PC Card Standard published by the Personal Computer Memory Card
International Association (PCMCIA). The router is shipped with a PC Card that contains
Junos OS. The PC Card can be used to copy Junos OS from the PC Card onto the Routing
Engine. You can also copy Junos OS from the Routing Engine onto a PC Card, for
example, to create a backup copy of upgrade software that you have obtained from
Juniper Networks. Instructions for copying software to a PC Card are available at the
Juniper Networks Support Web site (
in, navigate to the Customer Support Center, then to the download page for Junos OS.
NOTE: The software on a PC Card is loaded only onto the Routing Engine
into which the PC Card is inserted. It is not automatically copied to the
other Routing Engine.
Reset button—Reboots the Routing Engine when pressed.
on the Routing Engine faceplate accepts a Type I PC Card, as
http://www.juniper.net/support/ ). After logging
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