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Flow label [not draft-han-6man-in-band-signaling-for-transport-qos-00.txt]

Brian E Carpenter <brian.e.carpenter@gmail.com> Fri, 20 October 2017 00:05 UTC

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Subject: Flow label [not draft-han-6man-in-band-signaling-for-transport-qos-00.txt]
To: ipv6@ietf.org
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Fri, 20 Oct 2017 13:05:49 +1300
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On 20/10/2017 11:09, Toerless Eckert wrote:
> On Thu, Oct 19, 2017 at 03:00:35PM -0700, Tom Herbert wrote:
>> Bert, I don't follow. One of the big wins using the 3-tuple is that it can
>> still indicate a flow even if all the transport transport headers and
>> payload are encrypted. So this should allow specifying QoS without
>> revealing anything about the content except that the sender wants to group
>> certain packets together as a flow and apply QoS on them.
> 
> Problem with flow label is same as with hop-by-hop option: burned because
> nobody should dare use it for something useful with all the inconsistent 
> code out in the field.  Nothing against redefining it (with new encoding)

There is no encoding. It's 20 opaque bits (and always has been). Please
read https://tools.ietf.org/html/rfc6437.

   Brian

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