How does NDISWAN work?

[Mart]

Hi,
does somebody know how NDISWAN makes decisions which WAN link is best for
sent packet?
MSDN says: "In an NDIS WAN environment, NDISWAN examines the header of the
descriptor of a send packet and determines over which link the packet will be
sent", but I would like to know what item of packet descriptor header is
crucial.

[steve]

I would guess NDISWAN examines the first buffer in the
packet descriptor (using NdisGetFirstBufferFromPacket())
and looks at the layer 2 header to determine its
protocol. NDISWAN could then look at the devices that
support those protocols - the miniport drivers for each
of the NICS/WAN devices tell NDIS the medium types that
they support - see the help on MiniportInitialize() for
more info.

steve

-----Original Message-----
Hi,
does somebody know how NDISWAN makes decisions which WAN

link is best for

sent packet?
MSDN says: "In an NDIS WAN environment, NDISWAN examines

the header of the

descriptor of a send packet and determines over which

link the packet will be

sent", but I would like to know what item of packet

descriptor header is

crucial.
.