System Overview; T4000 Router Description - Juniper T4000 Hardware Manual

CHAPTER 1

System Overview

T4000 Router Description

Copyright © 2018, Juniper Networks, Inc.
T4000 Router Description on page 3
T4000 Hardware Component Overview on page 5
T4000 Component Redundancy on page 7
The Juniper Networks T4000 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). The
T4000 router accommodates up to eight Flexible PIC Concentrators (FPCs), each of
which can be configured with a variety of network media types. The router provides up
to 2.0 terabits per second (Tbps), full duplex (4.0 Tbps of any-to-any, nonblocking,
half-duplex) switching.
The router architecture cleanly separates control operations from packet forwarding
operations. This design eliminates processing and traffic bottlenecks, permitting the
router to achieve high performance.
Control operations in the router are performed by the host subsystem, which runs the
Junos operating system (Junos OS) to handle routing protocols, traffic engineering,
policy, policing, monitoring, and configuration management.
Forwarding operations in the router are performed by the Packet Forwarding Engines,
which consist of hardware, including ASICs, designed by Juniper Networks.
Application-specific integrated circuits (ASICs) are a definitive part of the router design;
they enable the router to achieve data forwarding rates that match current fiber-optic
capacity. The T4000 router provides up to a total of 2.4 billion packets per second
(Mpps) of forwarding.
Figure 1 on page 4 and Figure 2 on page 5 illustrate the front and rear of a T4000 router.
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