Use a QoS policy rule to define traffic to receive QoS treatment (either preferential treatment or bandwidth-limiting) and assign such traffic a QoS class of service.

Define a QoS policy rule to match to traffic based on:

Set up multiple QoS policy rules (

Policies

QoS

) to associate different types of traffic with different QoS Classes of service.

Because QoS is enforced on traffic as it egresses the firewall, the QoS policy rule is applied to traffic after the firewall has enforced all other security policy rules, including Network Address Translation (NAT) rules. However, the firewall evaluates QoS rules based on the contents of the original packet, such as pre-NAT source IP, pre-NAT source zone, pre-NAT destination IP, and post-NAT destination zone. Therefore, do not configure the QoS policy with the post-NAT addresses.