Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 189

Related
Documentation
Installing Software on an EX8200 Switch with Redundant Routing Engines (CLI
Procedure)
Copyright © 2010, Juniper Networks, Inc.
Reboot to start the new software:
5.
user@switch> request system reboot
After the reboot has completed, log in and verify that the new version of the software
6.
is properly installed:
user@switch> show version
Installing Software on EX Series Switches (J-Web Procedure) on page 90
Troubleshooting Software Installation on page 105
Junos OS Package Names on page 77
Understanding Software Installation on EX Series Switches on page 75
For an EX8200 switch with redundant Routing Engines, you can minimize disruption to
network operation during a Junos OS upgrade by upgrading the Routing Engines
separately, starting with the backup Routing Engine.
NOTE: If your switch is running Junos OS Release 10.4 or later, you can
upgrade the software packages on both Routing Engines with a single
command and with minimal network disruption by using nonstop software
upgrade (NSSU) instead of this procedure. See "Upgrading Software Using
Nonstop Software Upgrade (CLI Procedure)" on page 1197.
CAUTION: If graceful routing engine switchover (GRES), or nonstop active
routing (NSR) is enabled when you initiate a software installation, the
software does not install properly. Make sure you issue the CLI delete chassis
redundancy command when prompted. If GRES is enabled, it will be removed
with the redundancy command. By default, NSR is disabled. If NSR is enabled,
remove the nonstop-routing
hierarchy level to disable it.
To upgrade the software package on an EX8200 switch with one installed Routing Engine,
see "Installing Software on an EX Series Switch with a Single Routing Engine (CLI
Procedure)" on page 84.
To upgrade redundant Routing Engines, you first install the new Junos OS release on the
backup Routing Engine while keeping the currently running software version on the master
Routing Engine. After making sure that the new software version is running correctly on
the backup Routing Engine, you switch device control to the backup Routing Engine.
Finally, you install the new software on the new backup Routing Engine.
Chapter 5: Installing Junos OS
statement from the [edit routing-options]
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