CHAPTER 1
System Overview and Architecture
•
T640 Router Description on page 3
•
T640 Component Redundancy on page 4
•
T640 System Architecture Description on page 5
•
T640 Routing Engine Functions on page 5
•
T640 Packet Forwarding Engine Architecture on page 7
•
Data Flow Through the T640 Router on page 7
T640 Router Description
The T640 Core Router is a complete routing system that provides Gigabit Ethernet,
SONET/SDH, and other high-speed interfaces for large networks and network applications,
such as those supported by Internet service providers (ISPs).
Application-specific integrated circuits (ASICs) are a definitive part of the router design;
these ASICs enable the router to achieve data forwarding rates that match current
fiber-optic capacity.
The router accommodates up to eight Flexible PIC Concentrators (FPCs), which can
each be configured with a variety of network media types—altogether providing up to
128 SONET/SDH OC48/STM16, 32 SONET/SDH OC192/STM64, or 128 Gigabit Ethernet
ports for the router. In a standalone configuration, the router's maximum aggregate
throughput is 320 Gbps, full duplex.
The router is a modular, rack-mountable system. Two routers can be installed in one
standard, 78-in. telco rack.
Related
Documentation
T640 Chassis Description on page 15•
• T640 Physical Specifications on page 119
• T640 Environmental Specifications on page 122
• T640 DC Power System Electrical Specifications on page 125
3Copyright © 2017, Juniper Networks, Inc.
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