Basic Procedure For Upgrading To Release 10.4 - Juniper JUNOS OS 10.4 - RELEASE NOTES Release Note

Upgrade and Downgrade Instructions for Junos OS Release 10.4 for M Series, MX Series, and T Series Routers
Copyright © 2010, Juniper Networks, Inc.
Upgrade Policy for Junos OS Extended End-Of-Life Releases on page 77
Downgrade from Release 10.4 on page 78

Basic Procedure for Upgrading to Release 10.4

In order to upgrade to Junos OS 10.0 or later, you must be running Junos OS 9.0S2, 9.1S1,
9.2R4, 9.3R3, 9.4R3, 9.5R1, or later minor versions, or you must specify the no-validate
option on the request system software install
When upgrading or downgrading the Junos OS, always use the
packages (such as the
jbundle
support representative. For information about the contents of the
details of the installation process, see the Junos OS Installation and Upgrade Guide.
NOTE: You cannot upgrade by more than three releases at a time. For
example, if your routing platform is running Junos OS Release 10.0 you can
upgrade to Junos OS Release 10.3 but not to Junos OS Release 10.4 As a
workaround, first upgrade to Junos OS Release 10.3 and then upgrade to
Junos OS Release 10.4.
NOTE: With Junos OS Release 9.0 and later, the compact flash disk memory
requirement for Junos OS is 1 GB. For M7i and M10i routers with only 256 MB
memory, see the Customer Support Center JTAC Technical Bulletin
PSN-2007-10-001 at
https:/ /www.juniper.net/ alerts/viewalert.jsp?txtAlertNumber=PSN-2007-10-001&actionBtn=Search
NOTE: Before upgrading, back up the file system and the currently active
Junos configuration so that you can recover to a known, stable environment
in case the upgrade is unsuccessful. Issue the following command:
user@host> request system snapshot
The installation process rebuilds the file system and completely reinstalls
the Junos OS. Configuration information from the previous software
installation is retained, but the contents of log files might be erased. Stored
files on the routing platform, such as configuration templates and shell scripts
(the only exceptions are the
preserve the stored files, copy them to another system before upgrading or
downgrading the routing platform. For more information, see the Junos OS
System Basics Configuration Guide.
command.
package) only when so instructed by a Juniper Networks
and
juniper.conf ssh
package. Use other
jinstall
jinstall package and
files) might be removed. To
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