Figure 22: Typical FPCs Supported on the MX960 Router
g004417
DPCE-X-Q-40GE
DPCE-X-Q-40GE
FPC3MX-FPC2
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 “MX960 Component Redundancy” on page 12.
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
76
To Next Page
Loading...
