Figure 17: Sf Module Ex9200-Sf2 - Juniper EX9214 Hardware Manual

Copyright © 2017, Juniper Networks, Inc.

Figure 17: SF Module EX9200-SF2

EX9200-SF2
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The SF modules install horizontally into the front of the chassis. If any slots are empty,
you must install a cover panel.
The SF module has the following components:
Chassis management Ethernet switch
I2C bus logic, used for low-level communication with each component
Component redundancy circuitry
Control Board/Routing Engine mastership mechanism
Gigabit Ethernet switch that is connected to the embedded CPU complex on all
components
Control field-programmable gate array (FPGA)—Provides the Peripheral Component
Interconnect (PCI) interface to the Routing Engine
1000Base-T Ethernet controller—Provides a 1-Gbps Ethernet link between the Routing
Engines
Ethernet switch—Provides 1-Gbps link speeds between the Routing Engine and the
line cards
External clock interface—Allows BITS or GPS clock source input to the centralized
timing circuit, or allows centralized timing to be output to BITS or GPS
Chapter 2: Chassis Components and Descriptions
35