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SPC Components

Each SPC consists of the following components:

SPC cover, which functions as a ground plane and a stiffener.
Two Chassis Cluster Control ports for connecting multiple devices into a redundant chassis cluster. Refer to the JUNOS Software Security Configuration Guide for more information about connecting and configuring redundant chassis clusters.
Fabric interfaces.
Two Gigabit Ethernet interfaces that allow control information, route information, and statistics to be sent between the Routing Engine and the CPU on the SPCs.
Two interfaces from the SCBs that enable the boards to be powered on and controlled.
Physical SPC connectors.
Midplane connectors and power circuitry.
Processor subsystem, which includes a 1.2-GHz CPU, system controller, and 1 GB of SDRAM.
LEDs on the faceplate indicate the SPC status (see Table 1).

Table 1: SPC LEDs

Label	Color	State	Description
OK/FAIL	Green	On steadily	SPC is functioning normally.
OK/FAIL	Red	On steadily	SPC has failed.
STATUS	Off	Off	SPU is offline. If both SPUs are offline it is safe to remove the SPC from the chassis.
	Green	On steadily	SPU is operating normally.
	Amber	On steadily	SPU is initializing.
	Red	On steadily	SPU has an error or failure.
SERVICE	Off	Off	Service is not running on the SPU.
	Green	On steadily	Service is running on the SPU under acceptable load.
	Amber	On steadily	Service on the SPU is overloaded.
HA	Green	On steadily	All cluster members and monitored links are available.
	Red	On steadily	A cluster member is missing or unreachable, or the other node is no longer part of a cluster because it has been disabled by the dual membership and detection recovery process in reaction to a control link or fabric link failure.
	Amber	On steadily	All cluster members are present, but one or more monitored links are down.
	Unlit	Off	The node is not configured for clustering or it has been disabled by the dual membership and detection recovery process in reaction to a control link or fabric link failure.
LINK/ACT	Green	On steadily	Chassis Cluster Control port link is active.
LINK/ACT	Green	Off	No link.
ENABLE	Green	On steadily	The Chassis Cluster Control port is enabled.
ENABLE	Green	Off	The Chassis Cluster Control port is disabled.

Two LEDs, located on the craft interface above the SPC, display the status of the SPC and are labeled OK and FAIL. For more information on the SPC LEDs located on the craft interface, see the SRX 5800 Services Gateway Hardware Guide or the SRX 5600 Services Gateway Hardware Guide.

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