Quality of Service (QoS) and multiple paths

Quality of Service (QoS) is an issue that often arises in high-availability networks as well as realtime control systems. In the Qnet context, QoS really boils down to transmission media selection — in a system with two or more network interfaces, Qnet chooses which one to use, according to the policy you specify.

Note: If you have only a single network interface, the QoS policies don't apply at all.