CHAPTER 6
Line Card Components and Description
•
T640 FPC Description on page 67
•
T640 FPCs Supported on page 77
•
T640 PIC Description on page 79
•
T640 PICs Supported on page 80
•
T640 End-of-Life PICs Supported on page 87
•
T640 PIC/FPC Compatibility on page 89
T640 FPC Description
Up to eight Flexible PIC Concentrators (FPCs) install vertically in the front of the T640
Core Router (see Figure 27 on page 68). 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 Field-Replaceable
Units” on page 261. 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 333.
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.
67Copyright © 2017, Juniper Networks, Inc.
To Next Page
Loading...
Need help?
General
