Installing Software on Routing Devices (Junos OS)

Determine if this is the best procedure for upgrading your device:

• If your EX8200 switch is running Junos OS Release 10.4R3 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 on an EX6200 or EX8200 Standalone Switch Using Nonstop Software Upgrade (CLI Procedure).

• To upgrade two different Junos OS releases with no disruption on the control plane and with minimal disruption of traffic, you can use In-Service Software Upgrade, see Getting Started with Unified In-Service Software Upgrade for routers and switches, and Upgrading a Chassis Cluster Using In-Service Software Upgrade for SRX Series Firewalls.

• To upgrade the software running on EX Series Ethernet Switches with redundant Routing Engines and all member switches in EX Series Virtual Chassis with a single command, you can use Nonstop Software Upgrade, see Understanding Nonstop Software Upgrade on EX Series Switches.

• To upgrade the software package on an EX6200 switch or an EX8200 switch with one installed Routing Engine, see Installing Software on an EX Series Switch with a Virtual Chassis or Single Routing Engine (CLI Procedure).

To ensure GRES and NSR are disabled:

1. Log in to the primary Routing Engine’s console.

   For more information about logging in to the Routing Engine through the console port, see the specific hardware guide for your device.

2. From the CLI operational prompt, enter configuration mode:

3. Disable nonstop active routing (NSR) (supported on switches running Junos OS Release 10.4 or later):

4. Disable nonstop-bridging if it is enabled:

5. Disable Routing Engine redundancy if enabled:

6. Save the configuration change on both Routing Engines:

   Note:

   To ensure the most recent configuration changes are committed before the software upgrade, perform this step even if nonstop active routing and graceful Routing Engine switchover were previously disabled.

7. Exit the CLI configuration mode:

After the device has been prepared, you first install the new Junos OS release on the backup Routing Engine, while keeping the currently running software version on the primary Routing Engine. This enables the primary Routing Engine to continue operations, minimizing disruption to your network.

Before you start this procedure, decide which software package you need and download it to the /var/tmp directory of the primary Routing Engine. For information on which packages to use for which upgrades, see Junos OS Installation Package Names.

To install software on the backup Routing Engine:

1. Log in to the console port on the current primary Routing Engine in slot 0.

2. Install the new software package on the backup Routing Engine (re1) using the request system software add command:

   Installation and validation take about 15 minutes.

   CAUTION:

   Do not include the re0 or re1 option when you install a package using the request system software add command if the Routing Engine on which the package is located and the Routing Engine on which you want to install the package are the same. In such cases, the package gets deleted after a successful upgrade.

   For M Series, MX Series, and T Series routers running Junos OS Release 12.2 and later, you can use the request system software add set command to install multiple software packages at the same time:

   For more information about the request system software add set command, see request system software add (Junos OS) or the CLI Explorer.

3. Reboot the backup Routing Engine to start the new software:

   You must reboot the device to load the new installation of Junos OS on the device. You can combine steps 2 and 3 by adding reboot to the request system software add command. But if you do the steps separately, make sure you reboot the Routing Engine you just added system software to.

   Note:

   To terminate the installation, do not reboot your device. Instead, finish the installation and then issue the request system software delete software-package-name command. This is your last chance to stop the installation.

   All the software is loaded when you reboot the device. Installation can take between 5 and 10 minutes. The device then reboots from the boot device on which the software was just installed. When the reboot is complete, the device displays the login prompt.

   While the software is being upgraded, the Routing Engine on which you are performing the installation is not routing traffic.

4. Issue the show version invoke-on other-routing-engine command to verify the new software is installed.

5. (Optional) Add the jweb package using the request system software add command. Before you can add this package, you must first download the software as you did the installation package. For more information about downloading the jweb package, see Downloading Software (Junos OS).

   The jweb installation module adds a router management graphical user interface that you can use to view and configure your router.

Once the software is installed on the backup Routing Engine, you are ready to switch routing control to the backup Routing Engine, and then upgrade or downgrade the software on the remaining Routing Engine in slot 0.

To install software on the primary Routing Engine:

1. Transfer routing control from the primary to the backup Routing Engine:

   For more information about the request chassis routing-engine master command, see the CLI Explorer.

2. Verify that the Routing Engine in slot 1 is now the primary Routing Engine:

3. Install the new software package on the Routing Engine in slot 0 using the request system software add command:

   Installation and validation take about 15 minutes.

   CAUTION:

   Do not include the re0 or re1 option when you install a package using the request system software add command if the Routing Engine on which the package is located and the Routing Engine on which you want to install the package are the same. In such cases, the package gets deleted after a successful upgrade.

   For M Series, MX Series, and T Series routers running Junos OS Release 12.2 and later, you can use the request system software add set command to install multiple software packages at the same time:

   For more information about the request system software add set command, see request system software add (Junos OS) or the CLI Explorer.

4. Reboot the Routing Engine using the request system reboot command:

   You must reboot the device to load the new installation of Junos OS on the device. You can combine steps 3 and 4 by adding reboot to the request system software add command. But if you do the steps separately, make sure you reboot the Routing Engine you just added system software to.

   Note:

   To terminate the installation, do not reboot your device. Instead, finish the installation and then issue the request system software delete software-package-name command. This is your last chance to stop the installation.

   The software is loaded when you reboot the system. Installation can take between 5 and 10 minutes. The device then reboots from the boot device on which the software was just installed. When the reboot is complete, the device displays the login prompt.

   While the software is being upgraded, the Routing Engine on which you are performing the installation does not route traffic.

5. Log in to the current backup Routing Engine (slot 0) and issue the show version command to verify the version of the software installed.

6. (Optional) Add the jweb package using the request system software add command. Before you can add this package, you must first download the software as you did the installation package. For more information about downloading the jweb package, see Downloading Software (Junos OS).

   The jweb installation module adds a router management graphical user interface that you can use to view and configure your router.

Once the software is installed on both Routing Engines, you return the router back to its original configuration and back up the new installation.

To finalize the redundant Routing Engines upgrade:

1. Restore the configuration that existed before you started this procedure (from Preparing the Device for the Installation (Junos OS)):

   Note:

   The number on the rollback command should match the number of commits you did in preparing the router for the installation. For example, if you did a separate commit for disabling Routing Engine redundancy and disabling nonstop-bridging, you need to use rollback 2 in this step.

2. Save the configuration change on both Routing Engines:

3. Transfer routing control back to the original primary Routing Engine in slot 0:

   For more information about the request chassis routing-engine master command, see the CLI Explorer.

4. Verify that the Routing Engine (slot 0) is indeed the primary Routing Engine:

5. After you have installed the new software and are satisfied that it is successfully running, back up the new software on both the primary and the backup Routing Engines.

   • For backing up Junos OS with upgraded FreeBSD, use the request system snapshot recovery command. To find which platforms in which releases use Junos OS with upgraded FreeBSD, see Feature Explorer and enter Junos kernel upgrade to FreeBSD 10+. For more information, see Changes in Use of Snapshots for Junos OS with Upgraded FreeBSD.

   • For Junos OS, use the request system snapshot command:

   The root file system is backed up to /altroot, and /config is backed up to /altconfig. The root and /config file systems are on the router’s CompactFlash card, and the /altroot and /altconfig file systems are on the router’ s hard disk or solid-state drive (SSD).

   For more information about the request system snapshot command, see the CLI Explorer .

   Note:

   After you issue the request system snapshot command, you cannot return to the previous version of the software because the running copy and backup copy of the software are identical.