> Hmm...so if i understand this correctly, 'burst' controls 'rate' and > 'cburst' controls 'ceil'? exactly. > Lets say that i am generating bursty fixed length UDP traffic i.e.1470 > bytes every 5000us. > Now for a pkt size of 1470 bytes and 'rate' and 'ceil' being 1.536Mbit > what would be the ideal values of burst and cburst? So one 1.5k packet then 5ms pause, other 1.5 packet ... ok ? It leads to rate cca 1500/5ms = 300kBps = 2.4mbit. Because is exceeds your 1.5mbit rate so that the burst value is not so important. Just use minimal value: burstmin = 1.5mbit/8*10ms = 2k devik