Juniper CB2-PTX-S Routers

The Juniper Networks PTX5000 Packet Transport Router is designed for large networks and network applications, such as those supported by ISPs and high-volume content providers. The PTX5000 occupies 36 rack units (36 U) and accommodates up to eight Flexible PIC Concentrators (FPCs), each of which can be configured with two Physical Interface Cards (PICs) to support a variety of network media types.The system architecture of the PTX5000 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 ASICs are a definitive part of the hardware design and enable the PTX5000 to achieve data forwarding rates that match current fiber-optic capacity.