023 Token generator Token replenishment rate R bps 2. Tokens can accumulate up to bucket size, excess tokens discarded 1. Switch puts tokens into bucket at predetermined rate Bucket size B bits current bueket occupaney 3. Traffic secks admittance 5. If tokens are available, packet is queued for transmission Arriving to network packets Regulator Departing packets 4. Switch's queue regulator requests tokens equal to to size of the next packet 6. If tokens are not available, packet is either queued for transmission but marked as excess, buffered for later transmission, or discarded For a burst period of 250ms with a single burst of 50ms duration delivering 0.5Mbits and a departing packet rate of 10Mbps with a bucket capacity of 1Mbit determine what R should be to enable the bucket to keep up with the incoming bursts. The bucket is full to begin with and the 50ms burst occurs in the first part of the 250ms period