Juniper MX480, Руководство по оборудованию

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Figure 18: Midplane
See Also MX480 Router Description on page 29
•
•
MX480 Chassis Description on page 32
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MX480 Dense Port Concentrator (DPC) Description on page 90
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MX480 Modular Port Concentrator (MPC) Description on page 124
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MX-Series Switch Control Board (SCB) Overview on page 135
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MX480 Flexible PIC Concentrator (FPC) Description on page 98
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MX480 Power System Description on page 44
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 19 on page 61 shows RE-S-1800 Routing Engine and
Figure 20 on page 61 shows the RE-S-X6-64G Routing Engine.
Copyright © 2019, Juniper Networks, Inc. 60
MX480 Universal Routing Platform Hardware Guide