Data Flow In The Srx3400 Services Gateway; Srx3400 Services Gateway Midplane; Figure 9: Midplane - Juniper SRX3400 Hardware Manual

Data Flow in the SRX3400 Services Gateway

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SRX3400 Services Gateway Midplane

Copyright © 2013, Juniper Networks, Inc.
The services gateway receives data from the various physical interfaces on the I/O cards
(IOCs). Incoming data is passed through the Switch Fabric Board (SFB) to a Network
Processing Card (NPC), back to the SFB and on to a Services Processing Card (SPC).
The data is then passed out of the services gateway in reverse order—to the SFB, NPC,
SFB, and out to the IOC.
SRX3400 Services Gateway Chassis on page 23
Available Components for the SRX3400 Services Gateway on page 19
Hardware Component Locations in the SRX3400 Services Gateway Chassis on page 21
Installation Overview for the SRX3400 Services Gateway on page 137
The midplane in the SRX3400 Services Gateway is in the center of the chassis and
provides connections for installing up to four common form-factor modules (CFMs)
through the front of the chassis and up to three CFMs through the rear of the chassis.
See "Hardware Component Locations in the SRX3400 Services Gateway Chassis" on
page 21 for details about where the individual modules can be installed. The power
supplies install into the midplane from the rear of the chassis. The cooling system
components also connect to the midplane.
The midplane performs the following major functions:
Data path—Data packets are transferred across the midplane between the IOCs and
SPCs through the fabric ASICs on the SFBs.
Power distribution—The services gateway power supplies are connected to the
midplane, which distributes power to all of the services gateway components.
Signal path—The midplane provides the signal path to the IOCs, SFBs, SPCs, Routing
Engine, and other services gateway components for monitoring and control of the
system.

Figure 9: Midplane

Chapter 4: Hardware Components
Midplane
25