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PTX5000 Packet Transport Router Description

The PTX5000 Packet Transport Router is designed for large networks and network applications, such as those supported by ISPs. The PTX5000 accommodates up to eight Flexible PIC Concentrators (FPCs), each of which can be configured with a variety of network media types.

The system architecture cleanly separates control operations from packet forwarding operations. This design eliminates processing and traffic bottlenecks, permitting the PTX5000 to achieve high performance.

  • 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 PTX5000 to achieve data forwarding rates that match current fiber-optic capacity. A PTX5000 with first-generation FPCs that have four Packet Forwarding Engines provides up to a total of 4800 million packets per second (Mpps) of forwarding. In a PTX5000 with second-generation FPCs that have eight Packet Forwarding Engines, the forwarding capacity increases to 9600 Mpps.

Figure 1 and Figure 2 illustrate the front and rear of a PTX5000.

Figure 1: Front View of the PTX5000

Front View of the PTX5000
  1
Front-mounting flange
  6
FPCs and PICs
  2
Craft interface
  7
ESD point
  3
Upper horizontal fan tray
  8
Lower horizontal fan tray
  4
Cable management system
  9
Horizontal air filter
  5
Vertical fan tray and vertical air filter
10
Power supply module door and power supply modules air filter

Figure 2: Rear View of the PTX5000

Rear View of the PTX5000
  1
Center-mounting bracket
  6
Control Board CB1 and Routing Engine RE1
  2
Air exhaust
  7
ESD point
  3
Centralized Clock Generators (CCGs)
  8
Power distribution units (PDUs)
  4
Switch interface boards (SIBs)
  9
Chassis grounding points
  5
Control Board CB0 and Routing Engine RE0
 

Modified: 2015-05-11