Margaret Wasserman wrote:
...
> >Hosts or routers that do not support the functions of the Flow Label
> >field are required to set the field to zero when originating a packet,
> >and ignore the field when receiving a packet. All routers are required
> >to pass the field on unchanged when forwarding a packet.
>
> Why would we want to restrict possible flow-management mechanisms in
> this (somewhat arbitrary) way? I think that the question of whether
> the flow label can be modified en route should be left to the
> specific flow-management mechanism.
As I said before, this is broken. There is no magic by which all
routers along the path can know which mechanism applies to
which packet; the only way to construct workable solutions is with
^^^^^^
an immutable label. If you want something mutable, use the DSCP.
Brian
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