Table of Contents
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Chapter 3
Installation Overview
Installation Type Overview
Standard Installation
This section describes how to install a different JUNOS Software version on a routing
platform, for example, upgrading from JUNOS Release 8.4 to JUNOS Release 9.2.
This chapter covers the different methods used to upgrade and downgrade the
software and why each method is employed. It also covers the options available to
you during the installation process as well as issues that you need to understand
before you start an installation process.
This chapter includes the following topics:
Installation Type Overview on page 25
Installation Categories on the M Series, MX Series, T Series, TX Matrix, and TX
Matrix Plus Routers on page 26
Installation Categories on the J Series Routers on page 27
Verifying PIC Combinations on page 27
The three types of installations used to upgrade or downgrade your routing platform
are standard installation, category change, and recovery. The standard installation
is the standard method of upgrading and downgrading the software. Use a category
change installation when you are moving from one software category to another;
for example, if you are changing the router from using the standard JUNOS Software
to the JUNOS-FIPS category. Perform a recovery installation when the software on
the router is damaged or otherwise unable to accommodate a software upgrade or
downgrade.
A standard installation is the typical method used to upgrade or downgrade software
on the server. This method uses the installation package that matches the installation
package already installed on the system. For example, you might upgrade an M120
router running the JUNOS Software installed using the jinstall* installation package.
If you upgrade the router from the 9.0R2.10 release to the 9.1R1.8 release, you use
the jinstall-9.1R1.8 domestic-signed.tgz installation package. For information on the
different installation packages available, see "JUNOS Installation Packages" on
page 6.
Installation Type Overview
25
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