Assured Forwarding (AF) PHB
Four AF Classes
- within each class, packets receive one of three drop preference values which must result in at least 2 distinct drop probabilities
- no re-ordering allowed in same microflow (5 tuple of src/dst address and port + proto)
Requirements on congestion behavior
- allow short term bursts, but drop packets on persistent overload
- (gee, sounds like RED, doesn’t it?)