Select a Traffic Priority of high, medium or low, so the FortiGate unit manages the relative priorities of different types of traffic. For example, a policy for connecting to a secure web server needed to support e-commerce traffic should be assigned a high traffic priority. Less important services should be assigned a low priority. The firewall provides bandwidth to low-priority connections only when bandwidth is not needed for high-priority connections.

Be sure to enable traffic shaping on all security policies. If you do not apply any traffic shaping rule to a policy, the policy is set to high priority by default. Distribute security policies over all three priority queues.