To upgrade Wanguard and Wansight to version 8.1, please follow the steps listed below, in the presented order:

1. Login in to the web interface, go to Configuration » Components and stop all components
2. Logout from the web interface by selecting your user menu from the top-right part of the window
3. Stop the WANsupervisor service on all servers:

   service WANsupervisor stop
   

4. If you are using PF_RING as Capture Engine, update to PF_RING 8.0
5. If you are using Netmap as Capture Engine, update it to the latest git version
6. If you are using DPDK as Capture Engine, update it to version 21.11. Note that DPDK works only on Ubuntu 18, Ubuntu 20, Debian 10, Debian 11, and CentOS 8
7. Upgrade the software packages starting with the Console server. The Linux distribution should not be upgraded at this point (e.g. Ubuntu 18 to 20).
   On Red Hat/CentOS servers upgrade the packages with:

   yum upgrade

   On Debian/Ubuntu servers, upgrade the packages with:

   apt-get update; apt-get dist-upgrade

   Make sure the software is upgraded on all servers, not just on the Console server. It is very important to run the same software version everywhere.
8. Start the WANsupervisor service on all servers:

   service WANsupervisor start

9. Log in to the web interface and start the components from Configuration » Components
10. Review the release notes for version 8.1

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