On Wednesday 20 August 2003 12:50, Raghuveer wrote: > Hi Stef, > > Reffering to page < http://www.docum.org/stef.coene/qos/faq/cache/7.html > > > I found a para as follows, > > " CBQ is not always as accurate as it should be. See docum.org on the > test page for some tests with bounded classes. The algorithm used by cbq > is very "link sensitive". It calculates the link idle time and for that > it needs the real link bandwidth, average packet size and some other > parameters. But there calculations are not always accurate. So it's > possible that you will get inaccurate results if you use CBQ to limit > the traffic in a class. " > > Here Iam slightly confused with real link bandwidth, Can I understand > that while creating CBQ we need interface bandwidth (ethtool, mii-diag) > and and while assigning the classes real link bandwidth is required. An > example will definately help me. Can you pls suggest a way to find real > link bandwidth....? As ethtool and mii-diag will only get the interface > bandwidth. The bandwidth parameter is the real link bandwidth like ethtook or mii-diag will show you. If you want to limit all traffic to the link bandwidth, you have to create a class that's bounded and with rate = link bandwidth. You can create non-bounded sub classes but the bandwidth will be limit by the bounded class to the link bandwidth. Stef -- stef.coene@xxxxxxxxx "Using Linux as bandwidth manager" http://www.docum.org/ #lartc @ irc.oftc.net
