Mx240 Flexible Pic Concentrator (Fpc) Description - Juniper MX240 Hardware Manual

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MX240 Flexible PIC Concentrator (FPC) Description

A Flexible PIC Concentrator (FPC) occupies two DPC slots on an MX Series router. The DPC slots are
numbered 1/0, 1, and 2, bottom to top. One FPC can be installed horizontally in either slots 1/0 and 1, or
slots 1 and 2 on the front of the router (see Figure 35 on page 124). The interface corresponds to the lowest
numbered DPC slot for which the FPC is installed.
Figure 34 on page 123 shows typical FPCs supported on the MX240 router.
Figure 34: Typical FPCs Supported on the MX240 Router
MX-FPC2 FPC3
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 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 37.
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.