T4000 Router System Architecture Overview; Chapter 2 T4000 Router System Architecture Overview; System Architecture Description For T Series Routers; Figure 3: Router Architecture - Juniper T4000 Hardware Manual

CHAPTER 2
T4000 Router System Architecture
Overview

System Architecture Description for T Series Routers

Related
Documentation
Copyright © 2013, Juniper Networks, Inc.
System Architecture Description for T Series Routers on page 7
Routing Engine Functions for T Series Routers on page 8
Packet Forwarding Engine Architecture for T Series Routers on page 9
The T Series Core Routers have two main architectural components:
Routing Engine—One or more Routing Engines provide Layer 3 routing services and
network management.
Packet Forwarding Engines—These high-performance, ASIC-based components provide
Layer 2 and Layer 3 packet switching, route lookups, and packet forwarding.
The Routing Engines and the Packet Forwarding Engines perform their primary tasks
independently, although they constantly communicate through multiple 100 millions of
packets per second (Mbps) links. This arrangement streamlines forwarding and routing
control and runs Internet-scale backbone networks at high speeds.
shows the relationship between the Routing Engine and the Packet Forwarding Engines.

Figure 3: Router Architecture

Routing Engine Functions for T Series Routers on page 8
Packet Forwarding Engine Architecture for T Series Routers on page 9
Figure 3 on page 7
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