T640 RE-600 Description
The RE-600 Routing Engine boots from the storage media in this order: the PC Card (if present), then the CompactFlash card (if present), then the hard disk.
Figure 1: Routing Engine 600
Each Routing Engine 600 (shown in Figure 1) 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 1 describes the functions of the LED.
Table 1: Routing Engine 600 LEDs
Label
Color
State
Description
HD
Yellow
On steadily or blinking
Indicates activity on the hard drive.
Note: The LEDs on the Routing Engine do not necessarily indicate routing-related activity.
