[Tsvwg] Comments on: draft-ietf-tsvwg-rsvp-bw-reduction-01.txt

Hi.  I would like to comment on:

 	Title		: A Resource Reservation Protocol Extension for 
                          the Reduction of Bandwidth of a Reservation Flow
	Author(s)	: J. Polk, S. Dhesikan
	Filename	: draft-ietf-tsvwg-rsvp-bw-reduction-01.txt

Since it has a TSVWG file name, I assume it is a work item of TSVWG.

I suspect that this proposal is fundamentally flawed, at least in its
description of the problem.  It concerns the "priority" of RSVP
microflows, and cites Shai Herzog's RFC 3181.  However, note that 3181
does NOT talk about RSVP, and that there is no concept of flow
"priority" in RSVP itself.  Deliberately.  The priority of flows is a
higher-level notion that has no place in RSVP itself.  Thus, Herzog's
notion of priority is part of the policy mechanism, not part of TCP.

Layering and modularity in protocols matters.

Bob Braden

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