Before you begin

Before you start the upgrade or downgrade process, make sure you check the following:

  • The licensing framework and types of licenses. A software edition upgrade might require new licenses, such as upgrading from the standard edition to the Advanced edition, the standard edition to the Premium edition, or the Advanced edition to the Premium edition. Existing Citrix ADC licenses continue to work when you upgrade to version 12.1. For more information, see Licensing
  • Check for New and deprecated commands, parameters, and SNMP OIDs.
  • Check for Citrix ADC MPX Hardware and Software Compatibility Matrix.
  • If the Citrix ADC Gateway logon page is customized, then make sure that the UI theme is set to default.
  • Review the LOM Firmware Upgrade page, if you are upgrading LOM.
  • Download the Citrix ADC firmware from the Citrix ADC Downloads. For the detailed steps to download the Citrix ADC firmware, see the Download a Citrix ADC release package.
  • Perform a back up of the configuration file, customization file, certificates, monitor scripts, license files, and so on either manually or refer to the following documentation for back up using Citrix ADC CLI or GUI - Backup and restore.
  • Validate the integrity of the Citrix ADC and check available space before performing an upgrade. For more information about how to free up storage space, see How to free space on /var directory.

  • Check the Citrix ADC VPX Support matrix and usage guidelines.

  • Check the FAQ section.

For more information about prerequisites for upgrading or downgrading the Citrix ADC firmware, see these support articles:

Before you begin