JUNOS Internet Software Network Operations Guide: Hardware
40 !
Figure 10: T640 Routing Node
In a standalone configuration, the T640 routing node’s maximum aggregate
throughput is 320 Gbps, full duplex.
The T640 routing node supports two types of Flexible PIC Concentrators (FPCs):
! FPC2—Rated at 10 Gbps full duplex; supports PICs that are also used in the
M160 router.
! FPC3—Rated at 40 Gbps full duplex; supports higher-speed PICs.
The T640 routing node can operate with any combination of FPC2s and FPC3s
installed. Each FPC contains one or two Packet Forwarding Engines. The Packet
Forwarding Engine consists of Layer 2/Layer 3 Packet Processing
application-specific integrated circuits (ASICs), Switch Interface ASICs, T-series
Internet Processor ASICs, and a memory subsystem (MMB) which includes the
Queuing and Memory Interface ASICs. The 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. Each FPC contains data
memory, which is managed by the Queuing and Memory Interface ASICs. Each
FPC3 has two Packet Forwarding Engines, and each FPC2 has one Packet
Forwarding Engine.
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T640 front T640 rear
Air exhaust
SCG0
CB0
CB1
Routing
Engines
SIB0
SIB1
SIB2
SIB3
SIB4
SCG1
RE1
PEM0
Fan
tray
PEM1
RE0
Air
filter
Power
supplies
ESD point
Grounding points
1500
Craft interface
Rack-mounting ears
Fan tray
FPCs
(with PICs
installed)
Air filter
ESD point
Fan tray
Air intake
CIP
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