From: Ethan Katz-Bassett (ethan@cs.washington.edu)
Date: Wed Oct 27 2004 - 02:05:58 PDT
In this paper, the authors present a scheme for providing different levels
of tailored best-effort service within the Internet. The allocated-capacity
framework specified two types of packets, "in" and "out," and, during times
of congestion, routers favor in packets over out packets. Packets from a
given source host or to a given recipient host are marked in/out based on a
service profile between that host and the ISP. These profiles allow for
different criteria for in/out. I would have liked to see more examples of
different profiles.
The idea is that the aggregated in services could generally be provided
without congestion. The profiles provide an easy mechanism to allow market
forces to operate on the prices people pay for different levels of service.
Since the routers act only on in versus out, the specifics of the profiles
can evolve over time without impacting anything other than the tagging.
Clearly, network users sometimes want to specify the network capacity they
desire. The framework provides a much simpler approach to this problem than
firm reservations. The scheme does not seem particularly difficult to
implement. However, the framework would likely need to be widely adopted in
order to operate effectively/correctly. I would like to see evidence of how
the scheme behaves across multiple ISPs.
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