Juniper MX480 Hardware Manual page 65

The 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 router, control the
router interfaces, control some chassis components, and provide the interface for system management
and user access to the router.
You can install one or two Routing Engines in the router. The Routing Engines install into the front of the
chassis in horizontal slots in the SCBs labeled 0 and 1. 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 Routing Engines are hot-pluggable. Each Routing Engine must be installed directly into an SCB. A USB
port on the Routing Engine accepts a USB memory card that allows you to load Junos OS.
Figure 19 on page 66 shows RE-S-1800 Routing Engine and
Routing Engine.
Figure 19: RE-S-1800 Routing Engine
Figure 20: RE-S-X6-64G Routing Engine Front View
1 Extractor clips
—
2 Auxiliary port (AUX)
—
3 Console port (Con)
—
4 Management port (MGMT)
—
5 LEDs—ONLINE, OK/FAIL, and MASTER
—
Figure 20 on page 66
6 ONLINE/OFFLINE Button
—
7 SSD LEDs—DISK1 and DISK2
—
8 Ports—USB1 and USB2
—
9 RESET Button
—
10 SSD card slot cover
—
shows the RE-S-X6-64G
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