Table of Contents
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CHAPTER 4
Software Installation Overview
Installation Overview
Understanding Software Installation on EX Series Switches
Overview of the Software Installation Process
Copyright © 2010, Juniper Networks, Inc.
Installation Overview on page 69
Licenses Overview on page 72
Understanding Software Installation on EX Series Switches on page 69
Junos OS Package Names on page 71
Understanding System Snapshot on EX Series Switches on page 72
A Juniper Networks EX Series Ethernet Switch is delivered with Juniper Networks Junos
operating system (Junos OS) preinstalled. As new features and software fixes become
available, you must upgrade your software to use them. You can also downgrade Junos
OS to a previous release.
This topic covers:
Overview of the Software Installation Process on page 69
Software Package Security on page 70
Installing Software on a Virtual Chassis on page 70
Installing Software on EX8200 Switches with Redundant Routing Engines on page 70
Installing Software Using Automatic Software Download on page 70
Troubleshooting Software Installation on page 70
An EX Series switch is delivered with Junos OS preinstalled. When you connect power to
the switch, it starts (boots) up from the installed software.
You upgrade Junos OS on an EX Series switch by copying a software package to your
switch or another system on your local network, then use either the J-Web interface or
the CLI to install the new software package on the switch. Finally, you reboot the switch;
it boots from the upgraded software. After a successful upgrade, you should back up the
new current configuration to a secondary device.
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Troubleshooting
