Upgrade and Downgrade Instructions for JUNOS Release 10.1 for M Series, MX Series,
and T Series Routers
This section discusses the following topics:
■ Basic Procedure for Upgrading to Release 10.1 on page 98
■ Upgrading a Router with Redundant Routing Engines on page 101
■ Upgrading Juniper Routers Running Draft-Rosen Multicast VPN to JUNOS Release
10.1 on page 101
■ Upgrading the Software for a Routing Matrix on page 103
■ Upgrading Using ISSU on page 104
■ Upgrading from JUNOS Release 9.2 or Earlier on a Router Enabled for Both PIM
and NSR on page 104
■ Downgrade from Release 10.1 on page 105
Basic Procedure for Upgrading to Release 10.1
In order to upgrade to JUNOS 10.0 or later, you must be running JUNOS 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 command.
When upgrading or downgrading the JUNOS Software, always use the jinstall package.
Use other packages (such as the jbundle package) only when so instructed by a Juniper
Networks support representative. For information about the contents of the jinstall
package and 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 Release 9.4 you can upgrade to JUNOS
Release 10.0 but not to JUNOS Release 10.1 As a workaround, first upgrade to JUNOS
Release 10.0 and then upgrade to JUNOS Release 10.1.
NOTE: With JUNOS Release 9.0 and later, the compact flash disk memory requirement
for JUNOS Software 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.
98 ■ Upgrade and Downgrade Instructions for JUNOS Release 10.1 for M Series, MX Series, and T Series Routers
JUNOS 10.1 Software Release Notes
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