This article provides an example step-by-step procedure on upgrading a mixed-mode Virtual Chassis.

Although the steps to perform this task are fully documented in the  Installing Software on a Mixed Virtual Chassis with EX4200, EX4500, and EX4550 Switches (CLI Procedure)  technical documentation, this article provides an example.

• USB

• FTP

USB:

1. Format the USB drive to fat32 partition.

2. Copy the Junos file to USB.

3. Mount the USB on primary routing engine:
   
   root@:RE:0% mount_msdosfs /dev/da1s1 /mnt

4. Transfer the Junos file from USB to the /var/tmp directory of the primary member switch.
   
   Example: In the case of EX4300 and EX4600 mixed mode virtual-chassis

   root@:RE:0% cp jinstall-ex-4300-14.1X53-D40.8-domestic-signed.tgz /var/tmp
root@:RE:0% cp jinstall-ex-4600-14.1X53-D40.8-domestic-signed.tgz /var/tmp​

5. Verify if the file is present in /var/tmp directory:

   {master:0}
root> file ls /var/tmp
/var/tmp:
jinstall-ex-4300-14.1X53-D40.8-domestic-signed.tgz
jinstall-ex-4600-14.1X53-D40.8-domestic-signed.tgz

6. Execute the below command to install software on all the members of the virtual chassis:

   {master:0}
root> request system software add set [/var/tmp/jinstall-ex-4300-14.1X53-D40.8-domestic-signed.tgz /var/tmp/jinstall-ex-4600-14.1X53-D40.8-domestic-signed.tgz]

   [Mar 23 09:09:01]: Retrieving software images. This process can take several minutes. Please be patient..
Retrieving version and model information from /var/tmp/jinstall-ex-4600-14.1X53-D40.8-domestic-signed.tgz
Retrieving version and model information from /var/tmp/jinstall-ex-4300-14.1X53-D40.8-domestic-signed.tgz
Checking pending install on fpc1
Pushing bundle /var/tmp/jinstall-ex-4300-14.1X53-D40.8-domestic-signed.tgz to fpc1
Validating on fpc1
Done with validate of on VC members
fpc1:
Verify the signature of the new package
Verified jinstall-ex-4300-14.1X53-D40.8-domestic.tgz signed by PackageProductionRSA_2016
WARNING: A reboot is required to install the software
WARNING:     Use the 'request system reboot' command immediately
Checking pending install on fpc0

   Validating on fpc0
Done with validate of on VC members
fpc0:
Verified jinstall-vjunos-14.1X53-D40.8-domestic.tgz signed by PackageProductionSwitchingEc_2015
Verified jinstall-vjunos-14.1X53-D40.8-domestic.tgz signed by JuniperSwitchingProduction_2015
Adding vjunos...
Saving contents of boot area prior to installation
WARNING:     This package will load JUNOS 14.1X53-D40.8 software.
WARNING:     It will save JUNOS configuration files, and SSH keys
WARNING:     (if configured), but erase all other files and information
WARNING:     stored on this machine.  It will attempt to preserve dumps
WARNING:     and log files, but this can not be guaranteed.  This is the
WARNING:     pre-installation stage and all the software is loaded when
WARNING:     you reboot the system.
POST-INSTALL...
Saving the config files ...
NOTICE: uncommitted changes have been saved in /var/db/config/juniper.conf.pre-install
Pushing installation package to host...

7. Reboot all the member switches once the installation is complete.

   root> request system reboot all-members
Reboot the system ? [yes,no] (no) yes

8. Verify the version once the switches come up after reboot.

   {master:0}
root> show version
fpc0:
--------------------------------------------------------------------------
Model: ex4600-40f
Junos: 14.1X53-D40.8
JUNOS Base OS boot [14.1X53-D40.8]
JUNOS Base OS Software Suite [14.1X53-D40.8]
JUNOS Online Documentation [14.1X53-D40.8]
JUNOS Crypto Software Suite [14.1X53-D40.8]
JUNOS Kernel Software Suite [14.1X53-D40.8]
JUNOS Packet Forwarding Engine Support (qfx-ex-x86-32) [14.1X53-D40.8]
JUNOS Routing Software Suite [14.1X53-D40.8]
JUNOS SDN Software Suite [14.1X53-D40.8]
JUNOS Web Management Platform Package [14.1X53-D40.8]
JUNOS Enterprise Software Suite [14.1X53-D40.8]
JUNOS py-base-i386 [14.1X53-D40.8]
JUNOS Host Software [14.1X53-D27.3]
fpc1:
--------------------------------------------------------------------------
Model: ex4300-48t
Junos: 14.1X53-D40.8
JUNOS EX  Software Suite [14.1X53-D40.8]
JUNOS FIPS mode utilities [14.1X53-D40.8]
JUNOS Online Documentation [14.1X53-D40.8]
JUNOS EX 4300 Software Suite [14.1X53-D40.8]
JUNOS Web Management Platform Package [14.1X53-D40.8]
JUNOS py-base-powerpc [14.1X53-D40.8]

FTP:

1. Enable FTP on the switch.

   Root#set system services ftp

2. Upload the software package to /var/tmp/ using FTP application.

3. Verify the software in /var/tmp/

   ​{master:0}
root> file ls /var/tmp
/var/tmp:
jinstall-ex-4300-14.1X53-D40.8-domestic-signed.tgz
jinstall-ex-4600-14.1X53-D40.8-domestic-signed.tgz

4. Execute the below command to install software on all the members of the virtual chassis:
   
   root> request system software add set [/var/tmp/jinstall-ex-4300-14.1X53-D40.8-domestic-signed.tgz /var/tmp/jinstall-ex-4600-14.1X53-D40.8-domestic-signed.tgz]

  Note:  The upgrade procedure for QFX5100/EX4300 and EX4200/EX45XX mixed mode virtual-chassis is the same.

Example:

{master:0}
root> request system software add set [/var/tmp/jinstall-ex-4300-14.1X53-D40.8-domestic-signed.tgz /var/tmp/jinstall-qfx-5-14.1X53-D40.8-domestic-signed.tgz]

{master:0}
root> request system software add set [/var/tmp/jinstall-ex-4200-11.1R1.8-domestic-signed.tgz​ /var/tmp/jinstall-ex-4500-11.1R1.8-domestic-signed.tgz​]​

2021-03-26: Updated the article terminology to align with Juniper's Inclusion & Diversity initiatives.
2017-12-04: Modified 'Note' in the Solution section to accommodate the EX4200/EX45XX family, along with the command in the example.