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    Routing Engine SRX5K-RE-1800X4 Overview

    The enhanced Routing Engine is an Intel-based PC platform that runs Junos OS. Software processes that run on the Routing Engine maintain the routing tables, manage the routing protocols used on the device, control the device interfaces, control some chassis components, and provide the interface for system management and user access to the device.The Routing Engine must be installed directly into the SRX5K-SCBE. A USB port on the Routing Engine accepts a USB memory device that allows you to load Junos OS. Figure 1 shows the Routing Engine.

    Figure 1: SRX5K-RE-1800X4 Routing Engine

    SRX5K-RE-1800X4 Routing Engine

    Three ports located on the Routing Engine connect to one or more external devices on which system administrators can issue Junos OS CLI commands to manage the services gateway.

    The ports function as follows:

    • AUX–Connects the Routing Engine to a laptop, modem, or other auxiliary device through a serial cable with an RJ-45 connector.
    • CONSOLE–Connects the Routing Engine to a system console through a serial cable with an RJ-45 connector.
    • ETHERNET–Connects the Routing Engine through an Ethernet connection to a management LAN (or any other device that plugs into an Ethernet connection) for out-of-band management. The port uses an autosensing RJ-45 connector to support 10/100/1000 Mbps connections. Two small LEDs on the bottom of the port indicate the connection in use: the LED flashes yellow or green for a 10/100/1000 Mbps connection, and the LED is light green when traffic is passing through the port.

    The solid-state drive (SSD) slots located on the Routing Engine provide secondary storage for log files, for generating core files, and for rebooting the system if the CompactFlash card fails. Currently, SRX5K-RE-1800X4 only supports one 128-GB SSD.

    SRX5K-RE-1800X4 Routing Engine Boot Sequence

    The services gateway is shipped with three copies of the Junos OS preinstalled on the Routing Engine in the following locations:

    • On the CompactFlash card in the Routing Engine
    • On the SSD in the Routing Engine
    • On a USB flash drive that can be inserted into the slot on the Routing Engine faceplate

    The Routing Engine boots from the storage media in this order: the USB device (if present), the CompactFlash card, the solid-state drive (SSD), and then the LAN. Normally, the services gateway boots from the copy of the software on the CompactFlash card.

    Modified: 2016-06-02