Scb Slots; Scb Redundancy; Scb Components; Figure 36: Scb - Juniper MX240 Hardware Manual

MX240 3D Universal Edge Router Hardware Guide

SCB Slots

SCB Redundancy

SCB Components

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Figure 36: SCB

You can install one or two SCBs. The SCBs install horizontally into the front of the chassis
in the slots labeled and
0 1/0
MPC0, or FPC0). If any slots are empty, you must install a blank panel.
If two SCBs are installed, one SCB functions as the master SCB and the other as its
backup. If the master fails or is removed, the backup becomes the master.
Each SCB consists of 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
Switch fabric—Provides the switching functions for the DPCs, FPCs, and MPCs
Control field-programmable gate array (FPGA)—Provides the Peripheral Component
Interconnect (PCI) interface to the Routing Engine
(the multifunction slot
1/0
Copyright © 2017, Juniper Networks, Inc.
can contain either SCB1, DPC0,