Fpc Components - Juniper MX960 Hardware Manual

Figure 22: Typical FPCs Supported on the MX960 Router
MX-FPC2
If a slot is not occupied by a DPC, an FPC, or an SCB, a blank panel must be installed to shield the empty
slot and to allow cooling air to circulate properly through the router.
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 forward 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
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.

FPC Components

Each FPC consists of the following components:
FPC card carrier, which includes two PIC slots
Up to two Packet Forwarding Engines, each consisting of one I-chip for Layer 3 processing and one
Layer 2 network processor
Midplane connectors and power circuitry
Processor subsystem (PMB), which includes a 1.2-GHz CPU, system controller, 1 GB of SDRAM, and
two Gigabit Ethernet interfaces
FPC3
"MX960 Component Redundancy" on page
76
12.