Juniper MX960 Hardware Manual page 191

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