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DiffServ Recommendations (cont.) R-6. Functionally specify the International ETS PHB and National ETS PHB to be locally administered, additional instances of the EF PHB, with possibly different parameter values Separate ETS DiffServ codepoints allows separate ETS PHB EF PHB functionality is sufficient, but need separate instance with capability to set more stringent ETS-specific parameters, and to distinguish ETS traffic Using additional instances of an existing PHB eliminates the need for new protocol extension, minimizes the additional development and reduces the probability of unintended consequences |