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In my opinion, Draft's  claim of the beneficial effect of bandwidth
protection through reservation can be strengthen by referring to .
As it has been pointed out in , bandwidth reservation is beneficial for
heavily and maybe moderately loaded networks. However, for lightly loaded
network complete bandwidth sharing is superior to bandwidth
reservation. The question remains what is the right strategy if load is
uncertain, as in a case of default parameter setting or highly volatile
load. Obviously, load uncertainty creates risks of bandwidth over and
under-provisioning. The risk of over-provisioning is realized if bandwidth
reservation is employed in expectation of high load, while the actual load
is light. In opposite case the risk of under-provisioning is realized.
Paper  has quantified these risks and proposed to optimize the default
parameters by minimizing the worst-case scenario risk. The main conclusion
of  is that increase in the load uncertainty increases risk of bandwidth
under-provisioning and thus strengthen case for bandwidth protection
through reservation, especially in default setting context.
Some extensions of this approach to other situations of network
provisioning under uncertain demands can be found in -.
Appreciate any comments.
 V. Marbukh, "Network management under incomplete information on the
operational environment," IEEE Int. Symp. on Information Theory and its
Applications (ISITA2000), Honolulu, Hawaii, 2000.
 V. Marbukh, "Robust traffic engineering: game theoretic perspective,"
ACM SIGMETRICS Performance Evaluation Review, Vol. 30, Issue 3, Dec. 2002.
 V. Marbukh, "A scenario based framework for robust network
provisioning," International Teletraffic Congress (ITC), Berlin, Germany, 2003.
 V. Marbukh, "Network provisioning as a game against nature," IEEE
International Communications Conference (ICC), Anchorage, AK, 2003.