Juniper CBL-M40-PWR-AU ユーザーズマニュアル
System Overview
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Chapter 1
System Overview
This chapter provides an overview of the M40 Internet router, discussing the following topics:
System Description
The M40 Internet router is a complete routing system that provides high-speed interfaces for
large networks and network applications, such as those supported by Internet backbone
service providers. Application-specific integrated circuits (ASICs), a definitive part of the
router design, enable the router to forward data at the high speeds demanded by current
network media.
large networks and network applications, such as those supported by Internet backbone
service providers. Application-specific integrated circuits (ASICs), a definitive part of the
router design, enable the router to forward data at the high speeds demanded by current
network media.
The router accommodates up to eight Flexible PIC Concentrators (FPCs), each of which can
be configured with a variety of network media types—altogether providing up to
128 physical interface ports per system. The router height of 35 in. (89 cm) enables stacked
installation of two M40 routers in a single floor-to-ceiling rack, for increased port density per
unit of floor space.
be configured with a variety of network media types—altogether providing up to
128 physical interface ports per system. The router height of 35 in. (89 cm) enables stacked
installation of two M40 routers in a single floor-to-ceiling rack, for increased port density per
unit of floor space.
The router’s maximum aggregate throughput is 40 gigabits per second (Gbps). The router
provides very high throughput for any combination of Physical Interface Cards (PICs) that
does not exceed 3 Gbps on an FPC. A combination that exceeds 3 Gbps is supported, but
constitutes oversubscription.
provides very high throughput for any combination of Physical Interface Cards (PICs) that
does not exceed 3 Gbps on an FPC. A combination that exceeds 3 Gbps is supported, but
constitutes oversubscription.
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 line rates. Control operations in the router are performed by the
Routing Engine, which runs JUNOS Internet software to handle routing protocols, traffic
engineering, policy, monitoring, policing, and configuration management. Forwarding
operations in the router are performed by the Packet Forwarding Engine, which consists of
hardware, including ASICs, designed by Juniper Networks.
operations. This design eliminates processing and traffic bottlenecks, permitting the router to
achieve high-performance line rates. Control operations in the router are performed by the
Routing Engine, which runs JUNOS Internet software to handle routing protocols, traffic
engineering, policy, monitoring, policing, and configuration management. Forwarding
operations in the router are performed by the Packet Forwarding Engine, which consists of
hardware, including ASICs, designed by Juniper Networks.