Juniper-networks ERX-1410 Uživatelský manuál stáhnout pdf (Strana 34)

CHAPTER 1

ERX System Overview

1-14

Figure 1-10 Data flow when a spare line module is active

For information about installing modules for line module redundancy, see

Chapter 3, Installing ERX Modules. For information about configuring

and managing SRP module redundancy, see ERX System Basics

Configuration Guide, Chapter 5, Managing Line Modules and SRP

Modules, for more information.

Power

The system provides a power architecture that distributes redundant

–48 VDC feeds through the system to each line module, SRP module,

and fan module where DC-to-DC converters provide local conversion to

the required secondary voltages. The system design prevents a failure of

any one of the power components from causing any other component in

the system to fail.

Midplane

Redundancy

midplane

Primary

line module

Spare

line module

Redundancy

I/O module

Primary

I/O module

A packet arrives at the primary

I/O module.

The packet passes along the

redundancy midplane from the

primary I/O module to the

redundancy I/O module.

The packet passes from the

redundancy I/O module to the

spare line module.

The spare line module

processes the packet.

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Juniper-networks ERX-1410 Uživatelský manuál Strana 34