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IMPORTANT
SNS 3.x versions have reached End of Maintenance since July 1st, 2024.
We recommend that you update your SNS firewalls to a version with maintenance to guarantee the protection of your infrastructure.

# Step 1: Creating or joining a high availability cluster

Create a cluster | If this option is selected, the firewall will be prepared to receive other firewalls and will add itself to the cluster.
Join a cluster | If this option is selected, the appliance will attempt to connect to the firewall with the IP address defined during the creation of the cluster. The second firewall will then retrieve information from the first and synchronize with it. The cluster therefore comprises two firewalls: when the first firewall fails, the second will take over transparently. NOTE At the end of the wizard, the appliance will be rebooted. Once the reboot is complete, the appliance will be part of the cluster, and therefore no longer exists as an entity, but as a member of the cluster. WARNING If you choose to join a cluster, it implies that you have already created one beforehand, and have selected the option “Create a cluster” and have configured the necessary parameters to set it up on the first firewall.

WARNING

Do not create a cluster twice, as this would mean that you are setting up two high availability clusters, each containing a firewall, and not a high availability cluster containing two firewalls.

NOTE

A member of a cluster can be forced to be the active firewall, even if members of the group have differing firmware versions.