CHAPTER 1
PTX5000 Packet Transport Switch
Overview
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PTX5000 Packet Transport Switch Description on page 3
PTX5000 Packet Transport Switch Description
The PTX5000 Packet Transport Switch provides 10-Gigabit Ethernet, 40-Gigabit Ethernet,
and 100-Gigabit Ethernet interfaces for large networks and network applications, such
as those supported by Internet service providers (ISPs). The packet transport switch
accommodates up to eight Flexible PIC Concentrators (FPCs), each of which can be
configured with a variety of network media types. The packet transport switch provides
up to 8 terabits per second (Tbps) per second , full duplex (4 Tbps per second of
any-to-any, nonblocking, half-duplex) switching.
The system architecture cleanly separates control operations from packet forwarding
operations. This design eliminates processing and traffic bottlenecks, permitting the
packet transport switch to achieve high performance.
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Control operations 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 are performed by the Packet Forwarding Engines, which consist
of hardware, including ASICs, designed by Juniper Networks. The application-specific
integrated circuits (ASICs) are a definitive part of the hardware design; and enable the
packet transport switch to achieve data forwarding rates that match current fiber-optic
capacity. The PTX5000 Packet Transport Switch provides up to a total of 4800 packets
per second (Mpps) of forwarding.
Figure 1 on page 4 and Figure 2 on page 5 illustrate the front and rear of a packet
transport switch.
3Copyright © 2012, Juniper Networks, Inc.
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