System Overview And Architecture; T320 Router Description - Juniper Core Router T Series Hardware Manual

CHAPTER 1

System Overview and Architecture

T320 Router Description

Copyright © 2018, Juniper Networks, Inc.
T320 Router Description on page 3
T320 Component Redundancy on page 4
System Architecture Description for T Series Routers on page 5
Routing Engine Functions for T Series Routers on page 5
Packet Forwarding Engine Architecture for T Series Routers on page 7
The T320 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
64 Gigabit Ethernet, 64 SONET/SDH OC-48/STM-16, or 16 SONET/SDH OC-192/STM-64
ports for the router.
The router's maximum aggregate throughput is 160 Gbps, full duplex. The router can
forward traffic at high-performance rates for any combination of PICs that does not
exceed 20 Gbps on a single FPC3. Any combination exceeding 20 Gbps is supported, but
constitutes oversubscription. For information about the FPC types, see
Supported" on page 67.
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 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.
"T320 FPCs
3