Juniper T640 Hardware Manual page 64

T640 Core Router Hardware Guide
34
Figure 18: Routing Engine 600
Each Routing Engine 600 (shown in Figure 18 on page 34) consists of the following
components:
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).
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.
Reset button—Reboots the Routing Engine when pressed.
HD LED—Indicates activity on the hard drive. It does not necessarily indicate
routing-related activity.
NOTE: The LEDs that report host module status (including Routing Engine
status) are on the craft interface rather than the Routing Engine faceplate.
HD LED—Table 7 on page 35 describes the functions of the LED.
Copyright © 2010, Juniper Networks, Inc.