RFC 3290 Diffserv Informal Management Model May 2002 4.1 Definition ................................................. 13 4.1.1 Filters .................................................. 15 4.1.2 Overlapping Filters ...................................... 15 4.2 Examples ................................................... 16 4.2.1 Behavior Aggregate (BA) Classifier ....................... 16 4.2.2 Multi-Field (MF) Classifier .............................. 17 4.2.3 Free-form Classifier ..................................... 17 4.2.4 Other Possible Classifiers ............................... 18 5 Meters ....................................................... 19 5.1 Examples ................................................... 20 5.1.1 Average Rate Meter ....................................... 20 5.1.2 Exponential Weighted Moving Average (EWMA) Meter ......... 21 5.1.3 Two-Parameter Token Bucket Meter ......................... 21 5.1.4 Multi-Stage Token Bucket Meter ........................... 22 5.1.5 Null Meter ............................................... 23 6 Action Elements .............................................. 23 6.1 DSCP Marker ................................................ 24 6.2 Absolute Dropper ........................................... 24 6.3 Multiplexor ................................................ 25 6.4 Counter .................................................... 25 6.5 Null Action ................................................ 25 7 Queuing Elements ............................................. 25 7.1 Queuing Model .............................................. 26 7.1.1 FIFO Queue ............................................... 27 7.1.2 Scheduler ................................................ 28 7.1.3 Algorithmic Dropper ...................................... 30 7.2 Sharing load among traffic streams using queuing ........... 33 7.2.1 Load Sharing ............................................. 34 7.2.2 Traffic Priority ......................................... 35 8 Traffic Conditioning Blocks (TCBs) ........................... 35 8.1 TCB ........................................................ 36 8.1.1 Building blocks for Queuing .............................. 37 8.2 An Example TCB ............................................. 37 8.3 An Example TCB to Support Multiple Customers ............... 42 8.4 TCBs Supporting Microflow-based Services ................... 44 8.5 Cascaded TCBs .............................................. 47 9 Security Considerations ...................................... 47 10 Acknowledgments ............................................. 47 11 References .................................................. 47 Appendix A. Discussion of Token Buckets and Leaky Buckets ...... 50 Authors' Addresses ............................................. 55 Full Copyright Statement........................................ 56 Bernet, et. al. Informational