• High Availability (default setting) - In High Availability mode the VPN tunnel uses the first IP address to respond, or the primary IP address if a primary IP is configured and active. If the chosen IP address stops responding, the connection fails over to another responding IP address. If a primary IP address is configured, the VPN tunnel will stay on the backup IP address until the primary one becomes available again.
    • Load Sharing - In Load Sharing mode the encrypted traffic is distributed among all available links. Every new connection ready for encryption uses the next available link in a round robin manner. When a link becomes unavailable, all of its connections are distributed among the other available links. A link's availability is determined using RDP probing.

      The peer Security Gateway that responds to the connection will route the reply traffic through the same route that it was received on, as long as that link is available.