M320 Routing Engine Components
Each Routing Engine (shown in M320 Routing Engine Description) consists of the following components:
- CPU—Runs JUNOS Software to maintain the router's routing tables and routing protocols. It has a Pentium-class processor.
- DRAM—Provides storage for the routing and forwarding tables and for other Routing Engine processes.
- Internal flash disk—Provides primary storage for software images, configuration files, and microcode. The drive is a fixed CompactFlash card and is inaccessible from outside the router.
- Hard disk—Provides secondary storage for log files, memory dumps, and rebooting the system if the internal flash disk 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).
Each Routing Engine has one 10/100-Mbps Ethernet port for connecting to a management network, and two asynchronous serial ports—one for connecting to a console and one for connecting to a modem or other auxiliary device.
- EEPROM—Stores the serial number of the Routing Engine.
- Reset button—Reboots the Routing Engine when pressed.
