Alex,

>IPv6 has the flow label, and it has extension headers for more than just
>IPsec, which IPv4 has not.
>The flow label has a QoS purpose, which means precisely Intserv, and
>Diffserv.

There are other uses of flows (and possibly the flow label field) that have 
nothing to do with QOS.  It isn't limited to Intserv/Diffserv.

Bob


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