Juniper Networks MX480 - Manual (Page 56)

MX480 Routing Engine Overview
• MX480 Routing Engine Description on page 32
• RE-S-1800 Routing Engine Description for MX Series on page 34
• RE-S-1800 Routing Engine LEDs on page 35
• MX480 Routing Engine LEDs on page 36
MX480 Routing Engine Description
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 16: Routing Engine
Routing Engine Components
NOTE: For specific information about Routing Engine components (for
example, the amount of DRAM), issue the show chassis routing-engine
command.
Copyright © 2013, Juniper Networks, Inc. 32
MX480 3D Universal Edge Router Hardware Guide