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T640 RE-C1800 Description


RE-C1800 Components

Each RE-C1800 (Figure 1) consists of the following components:

  • CPU—Runs the Junos OS to maintain the routing tables and routing protocols.

  • DRAM—Provides storage for the routing and forwarding tables and for other Routing Engine processes.

  • 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 the management ports located on the CIP.

Figure 1: Routing Engine C1800 (RE-C1800)
Routing Engine C1800 (RE-C1800)

The faceplate of the RE-C1800 contains the following:

  • USB port—Provides a removable media interface through which you can install the Junos OS manually. The Junos OS supports USB version 1.1 and version 2.0 devices.

  • CompactFlash card slot—Provides primary storage for software images, configuration files, and microcode.

  • Two solid-state disk (SSD) slots—Provides secondary storage for log files, memory dumps, and rebooting the system if the CompactFlash card fails.


    DISK2 is not currently supported.

  • Reset button—Reboots the Routing Engine when pressed.

  • Offline button—Takes the Routing Engine offline when pressed.

  • Four LEDs—CF, DISK1, DISK2, and ONLINE.

  • Extractor clips—Control the locking system that secures the Routing Engine.

RE-C1800 Boot Order

The RE-C1800 Routing Engine boots from the storage media in this order: the USB device, then the CompactFlash card (if present), then DISK1, then the LAN.