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Upgrading Junos OS Software on a vSRX Instance


This section outlines how to upgrade Junos OS software on your vSRX instance to a newer release. Depending upon your preference, you can replace the vSRX software in one of two ways:

Upgrading the Junos OS for vSRX Software Release

You can directly upgrade the Junos OS for vSRX software using the CLI. Upgrading or downgrading Junos OS can take several hours, depending on the size and configuration of the network. You download the desired Junos OS Release for vSRX .tgz file from the Juniper Networks website.

You also can upgrade using J-Web (see J-Web) or the Junos Space Network Management Platform (see Junos Space).

For the procedure on upgrading a specific Junos OS for vSRX software release, see the Migration, Upgrade, and Downgrade Instructions topic in the release-specific vSRX Release Notes available on the vSRX TechLibrary.

Replacing the vSRX Instance on Azure

To replace a vSRX instance on Azure with a different software release:

  1. Log in to the vSRX instance using SSH and start the CLI.
  2. Enter configuration mode.
  3. Copy the existing Junos OS configuration from the vSRX. The contents of the current level of the statement hierarchy (and below) are saved, along with the statement hierarchy containing it. Note

    By default, the configuration is saved to a file in your home directory.

    • See Saving a Configuration File for additional background information on saving a Junos OS configuration file.

    • See file copy for information on how to copy files from one location to another location on the local device or to a location on a remote device that is reachable by the local device.

  4. Remove the vSRX instance on Azure as described in Removing a vSRX Instance from Microsoft Azure.
  5. Once the vSRX instance on Azure has been successfully removed, define the specifics of a vSRX instance prior to launching it.
  6. Launch the vSRX image using the desired software version available from Azure Marketplace.
  7. Load the previously copied Junos OS configuration file onto your new (upgraded) vSRX instance as described in Loading a Configuration File.