Managing Module Redundancy; Line Module Redundancy Overview - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual

CHAPTER 2

Managing Module Redundancy

Line Module Redundancy Overview

Copyright © 2010, Juniper Networks, Inc.
This chapter describes how to manage redundancy (stateless switchover) in line modules,
switch route processor (SRP) modules, switch fabric modules (SFMs), I/O modules, and
I/O adapters (IOAs) in E Series routers.
This chapter contains the following sections:
Line Module Redundancy Overview on page 9
Line Module Redundancy Requirements on page 10
Understanding Automatic Switchover on page 12
Understanding Reversion After Switchover on page 12
Configuring Line Module Redundancy on page 13
Managing Line Module Redundancy on page 13
Example: Forcing the Router to Switch from Primary Line Module to Spare Line
Module on page 14
Interoperation of Redundancy and Stateful Switchover for Line Modules on page 15
Understanding SRP Module Redundancy on page 16
Understanding Configuration of SRP Modules for Redundancy on page 19
Installing a Redundant SRP Module on page 20
Managing SRP Module Redundancy on page 21
Switching to the Redundant SRP Module on page 22
Determination of Redundancy Status for Line Modules and SRP Modules Using Status
LEDs on page 22
Monitoring Redundancy in Installed Hardware on page 23
Monitoring Redundancy in Line Module and SRP Modules on page 27
Monitoring Redundancy Status on E320 Router on page 30
You can install an extra line module in a group of identical line modules to provide
redundancy if one of the modules fails.
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