Figure 44: SCB-MX
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Junos OS Release 12.3 R1 and later
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Name in CLI: SCB
Software release
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Powers on and powers off DPCs, FPCs, and MPCs.
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Controls clocking, system resets, and booting.
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Monitors and controls system functions, including fan speed, board power status, power
distribution module status and control, and the craft interface
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Provides Ethernet connectivity to all processors in the chassis for control plane
communications.
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Provides bandwidth of up to 160 Gbps per slot with redundant fabric support.
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Provides interconnections to all the DPCs, FPCs, and MPCs within the chassis through
the switch fabrics integrated into the SCB-MX.
SCB-MX Functions
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Control Board and Routing Engine (CB-RE) mastership mechanism.
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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.
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Switch fabric—Provides switching functions for MPCs.
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1000Base-T Ethernet controller—Provides a 1 Gbps Ethernet link between the Routing
Engines.
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Power circuits for the Routing Engine and the SCBE2-MX.
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LEDs—Provide status of the SCBE2-MX and the clocking interface.
SCB-MX Components
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