Overview Of The M7I Router; M7I Router Description - Juniper M7i Hardware Manual

CHAPTER 1

Overview of the M7i Router

M7i Router Description

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M7i Router Description on page 3
The M7i Multiservice Edge Router is a complete routing system that provides ATM,
channelized, Ethernet, IP services, and SONET/SDH interfaces for large networks and
network applications, such as those supported by Internet service providers (ISPs).
The router accommodates up to four Physical Interface Cards (PICs). In addition to the
PICs, the Fixed Interface Card (FIC) provides two Fast Ethernet ports or one Gigabit
Ethernet port, depending on your configuration. The built-in tunnel interface on the
Compact Forwarding Engine Board (CFEB) and Enhanced Compact Forwarding Engine
Board (CFEB-E) provides tunneling services. The optional Adaptive Services Module
(ASM) on the CFEB and CFEB-E, and the optional MultiServices Module (MSM) on the
CFEB-E allow one or more services to be configured on this interface.
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 OS to handle routing
protocols, traffic engineering, policy, policing, monitoring, and configuration management.
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. Forwarding operations in the router are performed by the Packet Forwarding
Engine, which consists of hardware, including ASICs, designed by Juniper Networks. The
Packet Forwarding Engine can forward up to 16 million packets per second (Mpps) for
all packet sizes. The aggregate throughput is 4 gigabits per second (Gbps), full duplex,
for the FPC with 4 PIC slots. The fixed interface card (FIC) has a maximum throughput
of 1 Gbps full duplex. Inserting a combination of PICs with an aggregate higher than the
maximum throughput of the FPC is supported, but constitutes oversubscription of the
FPC.
M7i Component Redundancy on page 5
M7i Chassis Description on page 6
M7i Router Physical Specifications on page 159
Overview of M7i Router Installation on page 39
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