In your previous mail you wrote:
any implementation (hardware or software) that extracts
the 5-tuple has to follow the linked list to the end.
=> and in a rare case ports are not in the first fragment...
Or we can strongly recommend that all hosts set the flow label, so
that we can use the 3-tuple {source address, dest address, flow label}.
=> the flow label was designed for it, wasn't it? And I can't see
a problem with recommending to set the flow label to get a "better" QoS.
BTW this simplifies fragment classifying too.
Regards
francis.dup...@fdupont.fr
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