Routing Engine Srx5K-Re-13-20 - Juniper SRX5400 Manual

Routing Engine SRX5K-RE-13-20

Copyright © 2014, Juniper Networks, Inc.
The SRX5K-RE-13-20 Routing Engine
that runs the Junos operating system (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.
Figure 30: Routing Engine
You must install at least one Routing Engine in the services gateway. You can install a
second Routing Engine if both Routing Engines are running Junos OS Release 10.0 or
later. A second Routing Engine is required if you are using the dual chassis cluster control
link feature available in Junos OS Release 10.0 and later. The second Routing Engine
does not perform all the functions of a Routing Engine and does not improve resiliency
or redundancy. The second Routing Engine and the Switch Control Board (SCB) in which
it is installed do not constitute a host subsystem. The only function of the second Routing
Engine is to enable the hardware infrastructure that enables the chassis cluster control
1 port on the Services Processing Card (SPC) used for chassis cluster control links. If you
install only one Routing Engine in the services gateway, you must install it in the slot in
the front panel of SCB0. If you install a second Routing Engine to use the dual chassis
cluster control link feature, you install it in the slot in the front panel of SCB1.
The Routing Engine consists of the following components:
CPU—Runs Junos OS to maintain the services gateway's routing tables and routing
protocols. It has a Pentium-class processor.
DRAM—Provides storage for the routing and forwarding tables and for other Routing
Engine processes.
USB port—Provides a removable media interface through which you can install Junos
OS manually. Junos supports USB version 1.0.
Internal flash disk—Provides primary storage for software images, configuration files,
and microcode. The disk is a fixed compact flash and is inaccessible from outside the
services gateway.
Routing Engine SRX5K-RE-13-20
(Figure 30 on page 39) is an Intel-based PC platform
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