Disable Priority Support by Default (NDIS 5.1)
Note NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.
Miniport drivers should make support for priority marking a NIC property that is disabled by default. Because transmitting priority-marked packets will not work in all network environments and there are currently no standardized mechanisms for determining if it will, miniport drivers must disable this priority-marking property by default. Miniport drivers should be set up so that users can enable this priority-marking property.