T640 Flexible Pic Concentrators (Fpcs) Overview; T640 Fpc Description; Safety Requirements, Warnings, And Guidelines For Installing The T640 Router - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
Related
Documentation

T640 Flexible PIC Concentrators (FPCs) Overview

T640 FPC Description

18
T640 Router Description on page 3
Safety Requirements, Warnings, and Guidelines for Installing the T640 Router on
page 85
T640 Physical Specifications on page 341
T640 FPC Description on page 18
T640 FPCs Supported on page 28
Up to eight Flexible PIC Concentrators (FPCs) install vertically in the front of the T640
Core Router (see Figure 7 on page 19). The FPC slots are numbered left to right from
FPC0 to FPC7 . An FPC can be installed into any FPC slot on the router, regardless of which
PICs it contains.
If a slot is not occupied by an FPC, an FPC blank panel must be installed to shield the
empty slot and to allow cooling air to circulate properly through the router.
Each FPC contains one or two Packet Forwarding Engines. The 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. Each FPC contains data memory
that is managed by the Queuing and Memory Interface ASICs.
FPCs are hot-removable and hot-insertable, as described in "T640 Router FRU Overview"
on page 4. 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. For FPC
replacement instructions, see "Replacing a T640 FPC" on page 219.
Each FPC consists of the following components:
FPC card carrier.
One or two Packet Forwarding Engines, consisting of Layer 2/Layer 3 Packet Processing
ASICs, Switch Interface ASICs, T-series Internet Processor ASICs, and a Memory
Mezzanine Board (MMB) which includes the Queuing and Memory Interface ASICs.
Each Type 1, Type 2, and Type 4 FPC has one Packet Forwarding Engine, and each Type
3 FPC has two Packet Forwarding Engines.
Processor Mezzanine Board (PMB), which includes a 300-MHz CPU, system controller,
256 MB of SDRAM, and two Fast Ethernet interfaces.
Two LEDs, located on the craft interface above the FPC, that display the status of the
FPC. For more information about the FPC LEDs, see "T640 Craft Interface FPC LEDs
and Online/Offline Buttons" on page 45.
FPC online/offline button, located on the craft interface above the FPC.
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