Traffic Shaping
- Data packets leak from a bucket of depth “sigma” at a rate “rho”.
- Network knows that the flow will never inject traffic at a rate higher than “rho” --- incoming traffic is bounded
- Easy for the network to police
- Accommodates well fixed-rate flows (“rho” set to rate), but does not accommodate variable-rate (bursty) flows unless “rho” is set to peak rate, which is wasteful