Specifications

■ Before upgrading to JUNOS software with enhanced services, perform the
following:
■ Upgrade to a 512-MB compact flash. For upgrading the DRAM module or
compact flash, see the “Upgrading the DRAM Module or Compact Flash”
section of the JUNOS Software Migration Guide. For information on formatting
a new, blank compact flash card, see the “Configuring Internal Compact
Flash Recovery” section of the JUNOS Software Administration Guide.
This section contains the following topics:
■ Upgrade and Downgrade Overview on page 11
■ Before You Begin on page 12
■ Downloading Software Upgrades from Juniper Networks on page 13
■ Installing Software Upgrades with the J-Web Interface on page 13
■ Installing Software Upgrades with the CLI on page 15
■ Downgrade Instructions on page 16
Upgrade and Downgrade Overview
Typically, you upgrade JUNOS software with enhanced services on a Services Router
by downloading a set of images onto your router or onto another system on your
local network, such as a PC. You then uncompress the package and install the
uncompressed software using the CLI. Finally, you boot your system with this
upgraded device.
A JUNOS software package is a collection of files that make up a software component.
You can download software packages either for upgrading JUNOS software or for
recovering a primary compact flash.
All JUNOS software and JUNOS software with enhanced services is delivered in signed
packages that contain digital signatures, Secure Hash Algorithm (SHA-1) checksums,
and Message Digest 5 (MD5) checksums. For more information about signed software
packages, see the JUNOS Software Installation and Upgrade Guide.
Upgrade Software Packages
Download an upgrade software package, also known as an install package, to install
new features and software fixes as they become available.
An upgrade software package name is in the following format:
package-name-m.nZx.y-distribution.tgz.
■
package-name is the name of the package—for example, junos-jsr.
■
m.n is the software release, with m representing the major release number—for
example, 9.0.
■
Z indicates the type of software release. For example, R indicates released
software, and B indicates beta-level software.
JUNOS Software with Enhanced Services Upgrade and Downgrade Instructions ■ 11
JUNOS Software with Enhanced Services Upgrade and Downgrade Instructions