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Rationale Looks like 2205+, using leading 2 bits of type field as indicator RSVP defined 3 extension classes All 3 got used; some specs used all 3 at once Could do with more background info on the subject But: NSIS layering means RSVP experience not directly applicable Mailing list discussion to split one class Using ‘refresh’ class needs security awareness Using ‘mandatory’ class is not mandatory Can always discover/negotiate extended capabilities as a policy in the NSLP design instead |