By using the system traffic qualifier in a rule for port group or port, you can determine whether certain system data traffic must be marked with a QoS tag, allowed, or dropped.
System Traffic Type
You can select the type of traffic through the ports of the group that carries system data, that is, traffic for management from vCenter Server , storage, VMware vSphere® vMotion®, and vSphere Fault Tolerance. You can mark or filter only a specific traffic type, or for all system data traffic except for a infrastructure feature. For example, you can mark with a QoS value or filter the traffic for management from vCenter Server , storage and vMotion, but not the traffic carrying the Fault Tolerance data.
