April 25, 2000John Kristoff1 DePaul University Internet Traffic Report John Kristoff

April 25, 2000John Kristoff2 Key Concept There is no predictable Mother’s Day Effect on the Internet. Killer apps, denial of service attacks and other large utilization increases can and will occur without warning.

April 25, 2000John Kristoff3 What We Know zInternet bandwidth is 9 Mb/s yMost users have 10 Mb/s to the desktop zDaily, weekly, monthly utilization statistics yDaily weekday utilization ~100% continuously zResNet students largest consumer by far zNapster application ~20% of bandwidth zWe’re surviving

April 25, 2000John Kristoff4 Internet Bandwidth zEven with only a marginal increase in bandwidth, Internet performance has gotten much better. Why?

April 25, 2000John Kristoff5 Our Statistics

April 25, 2000John Kristoff6 Bandwidth Management zInternet bandwidth is our last mile zDifficult to provide fairness zResNet ymany shared LANs ymany users suffer! zThrow bandwidth at the problem? zNo silver bullet today

April 25, 2000John Kristoff7 Napster ResNet’s Killer App zMusic file sharing (MP3’s) zLegal issues zHow have other Universities responded? yBlocking yPolicies yTraffic limits

April 25, 2000John Kristoff8 Networks Group Internet Bandwidth Strategy zPolicy first zTraffic limits yvery unfair ynot perfect zA fairness architecture yControl at the edge (all the way to the user) yDifficult, but best strategy long term

April 25, 2000John Kristoff9 What Else? zTraffic identification tools yNot automated yprivacy issues zHow much bandwidth do we need/want? zHow do we get more cheaply? yIllinois Century Network yPeering zHow do we use it effectively?

April 25, 2000John Kristoff10 Peering