Juniper MX240 - Figure 24: FPC Installed in the MX240 Router Chassis; FPC Components

Each FPC supports up to two PICs. On an FPC2, one Packet Forwarding Engine receives
incoming packets from the PICs installed on the FPC and forwards them through the
switch planes to the appropriate destination port. On an FPC3, two Packet Forwarding
Engines receive incoming packets from the PICs installed on the FPC and forwards them
through the switch planes to the appropriate destination port. The FPCs interface with
the power supplies and SCBs.
FPCs are hot-removable and hot-insertable, as described in “MX240 Component
Redundancy” on page 7. When you install an FPC into a functioning router, the Routing
Engine downloads the FPC software, the FPC runs its diagnostics, and the PICs, housed
on the FPC, are enabled. Forwarding continues uninterrupted during this process. When
you remove or install an FPC, packet forwarding between other DPCs or FPCs is not
affected.
Figure 24: FPC Installed in the MX240 Router Chassis
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FPC Components
Each FPC consists of the following components:
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FPC card carrier, which includes two PIC slots.
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Up to two Packet Forwarding Engines, each consisting of one I-chip for Layer 3
processing and one Layer 2 network processor.
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Midplane connectors and power circuitry.
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Processor subsystem (PMB), which includes a 1.2-GHz CPU, system controller, 1 GB of
SDRAM, and two Gigabit Ethernet interfaces.
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Two LEDs, located on the craft interface above the FPC, that display the status of the
FPC and are labeled OK and FAIL. For more information about the FPC LEDs located
on the craft interface, see “FPC LEDs on the MX240 Craft Interface” on page 15.
•
FPC online/offline button, located on the craft interface above the FPC
Related
Documentation
MX240 FPC Terminology•
• Replacing an MX240 FPC on page 302
• Maintaining MX240 FPCs on page 387
Copyright © 2017, Juniper Networks, Inc.58
MX240 3D Universal Edge Router Hardware Guide