Mx104 Routing Engine Components; Figure 11: Mx104 Routing Engine - Juniper MX104 Hardware Manual

MX104 Routing Engine Components

Copyright © 2014, Juniper Networks, Inc.
You can install one or two Routing Engines in the router. The Routing Engines install into
the front of the chassis. Two USB ports on the Routing Engine accepts a USB memory
card that allow you to load Junos OS.
If two Routing Engines are installed, one functions as the master and the other acts as
the backup. If the master Routing Engine fails or is removed and the backup is configured
appropriately, the backup takes over as the master. The backup Routing Engine is
hot-insertable and hot-removable.
The MX104 router supports the Routing Engine with model number RE-MX104.

Figure 11: MX104 Routing Engine

MX104 Routing Engine Components on page 21
MX104 Routing Engine Buttons on page 22
MX104 Routing Engine LEDs on page 22
MX104 Boot Sequence on page 23
Five ports, located on the right side of the Routing Engine, connect the Routing Engine
to one or more external devices on which system administrators can issue Junos OS
command-line interface (CLI) commands to manage the router.
The Routing Engine consists of the following components:
1.8-GHz CPU—Runs Junos OS to maintain the router's routing tables and routing
protocols.
4-GB DDR3 RAM (mini DIMM)—Provides storage for the routing and forwarding tables
and for other Routing Engine processes.
8-GB on-board NAND Flash—Provides primary storage for software images,
configuration files, and microcode. The NAND flash is fixed and is inaccessible from
outside the router.
Interface ports—Provides access to management devices.
—Not supported.
AUX
CONSOLE —Connects the Routing Engine to a system console through a serial cable
with an RJ-45 connector.
—Connects the Routing Engine through an Ethernet connection to a
ETHERNET
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-Mbps, 100-Mbps, or 1000-Mbps connections. Two small LEDs on the right of the
port indicate the connection in use: see
Chapter 2: MX104 Hardware Components
"MX104 Routing Engine LEDs" on page 22.
21