Juniper Networks M10i manual System Overview, System Description, Field-Replaceable Units FRUs

Chapter 1

System Overview

This chapter provides an overview of the Juniper Networks M10i Internet router, discussing the following topics:

■System Description on page 3

■Field-Replaceable Units (FRUs) on page 3

■System Redundancy on page 4

■Safety Requirements, Warnings, and Guidelines on page 5

System Description

The M10i Internet router provides high-speed interfaces for medium and large networks and network applications, such as those supported by Internet service providers (ISPs). 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 M10i router supports up to eight Physical Interface Cards (PICs). The router height of 8.7 in. (22.1 cm) enables stacked installation of eight M10i routers in a single floor-to-ceiling rack, for increased port density per unit of floor space.

The router's maximum aggregate throughput is 3.2 gigabits per second (Gbps) full duplex per FPC (6.4 Gbps full-duplex total throughput rate). Inserting a combination of PICs with an aggregate higher than the maximum throughput per FPC is supported, but constitutes oversubscription of the FPC.

The router architecture cleanly separates control operations from packet forwarding operations, which helps to eliminate processing and traffic bottlenecks. Control operations in the router are performed by the Routing Engine, which runs JUNOS Internet software to handle routing protocols, traffic engineering, policy, policing, monitoring, 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.

Field-Replaceable Units (FRUs)

Field-replaceable units (FRUs) are router components that can be replaced at the customer site. Replacing most FRUs requires minimal router downtime. The router uses the following types of FRUs:

System Description ■ 3