ping with dscp windows ignore ecn-ce field

when I ping from machine A to B:

>ping 121.1.1.1 -v 0x47

windows keeps delivering the ToS field as 0x46 in the IP datagram. This is
what Wireshark reported. However, I didn't have any problem when pinging
from a linux box. It appears that the 2nd Hex will always be round off to
the lower even number when pinging from windows machine, e.g:

0x27 becomes 0x26
0x15 becomes 0x14
0xA3 becomes 0xA2


and so on....

When looking closely in Wireshark, this is this due to the last bit of the
QoS because it's related to ECN-CE ....whatever, this means....does anyone
know how can I turn on this function? So I can set the traffic all the way
from 0 to 255 without any limitation?


and secondly, starting with windows 2000 ....has microsoft updated the QoS
filed to DSCP? Because when I look at ping /?, it still showing QoS filed as
ToS and eveyrone knows that ToS is obsolete.