Switch Control Board Srx5K-Scb - Juniper SRX5600 User Manual

SRX5600 and SRX5800 Services Gateway Card Guide

Switch Control Board SRX5K-SCB

12
The SRX5K-SCB Switch Control Board (SCB)
functions:
Powers on and powers off I/O cards (IOCs) and Services Processing Cards (SPCs)
Controls clocking, system resets, and booting
Monitors and controls system functions, including fan speed, board power status, PDM
status and control, and the system front panel
Provides interconnections to all the IOCs within the chassis through the switch fabrics
integrated into the SCB
The SRX5600 Services Gateway must have at least one SCB installed, and you can
install a second SCB for switch fabric redundancy. The SRX5800 Services Gateway must
have at least two SCBs installed, and you can install a third SCB for switch fabric
redundancy.
When the SCB is part of a host subsystem, the Routing Engine is installed directly into a
slot on the faceplate of the SCB .
Figure 5: Switch Control Board SRX5K-SCB
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.
(Figure 5 on page 12) performs the following
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