Line Card Components And Descriptions; M120 Flexible Pic Concentrators (Fpcs) Description - Juniper M120 Hardware Manual

CHAPTER 6

Line Card Components and Descriptions

M120 Flexible PIC Concentrators (FPCs) Description

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M120 Flexible PIC Concentrators (FPCs) Description on page 51
M120 Flexible PIC Concentrators (FPCs) LED on page 54
M120 Compact FPCs (CFPCs) Description on page 54
M120 FPCs and CFPCs Supported on page 56
M120 PICs Description on page 57
M120 PIC LEDs on page 58
M120 PICs Supported on page 58
M120 End-of-Life PICs Supported on page 63
M120 PIC/FPC Compatibility on page 66
The Flexible PIC Concentrators (FPCs) provide the infrastructure to power and control
PICs and to translate packets to and from each PIC into a standard interface that the
FEB processes.
Each Packet Forwarding Engine receives incoming packets from the PICs installed on
the FPC and forwards them through the switch planes to the appropriate destination
FPC and port. Each FPC contains data memory, which is managed by the Queuing and
Memory Interface ASICs, and either one or two Packet Forwarding Engines.
Each FPC contains a translator, a crossbar connection to the FEBs, power subsystem,
and the physical PIC connectors. The assembly contains a translation component that
converts between the midplane signals and the signals required by the types of supported
PICs. The translator fully terminates the PIC side connection, providing local flow control,
buffering, and electrical conversion.
The FPCs interface with the following router system components: the PEMs, CBs, FEBs,
and PICs.
The FPC slots on the router allow four PICs in Type 1 or Type 2 FPCs and one PIC in a
Type 3 FPC to share power circuits and a CPU. Up to four FPCs install vertically in the
front of the router (see Figure 16 on page
from to . Depending on the FPC type, an FPC has either one or four slots into
FPC2 FPC5
52). The FPC slots are numbered left to right
51