Hi everyone,
I want to do passive available bandwidth measurement. I was just wandering
what tools/techniques people are generally using these days. And is it a
good idea to use congestion window as parameter.
Ghulam
I used a passive TCP RTT calculator and TCP re-trans monitor to guess the conditions to a host or group of hosts with some success. I the. Derived the network "weather" from this and it worked pretty well to dynamically tune DPI box policing for wireless networks.
It also makes cool graphs. Especially if you add other parameters and do it all in various colours.
I am more interested in getting an "Available Bandwidth" estimator. Due to
this available bandwidth, I am interested in congestion window. As whenever
congestion window goes to half it means the data rate has gone to its upper
limit. I want to use this particular property of congestion window to
calculate bandwidth.
Any idea how can one do bandwidth measurement based on this?
Thanks a lot,
Ghulam
I am more interested in getting an "Available Bandwidth" estimator. Due to
this available bandwidth, I am interested in congestion window. As whenever
congestion window goes to half it means the data rate has gone to its upper
limit. I want to use this particular property of congestion window to
calculate bandwidth.
Any idea how can one do bandwidth measurement based on this?
vern paxson did extensive work in this area. van jacobson too.
randy
Thanks a lot for referring to such valuable resources. However, the problem
is that these are active measurement tools. Anyways, I will keep on looking
and will post if I'll find a good passive measurement solution.
Regards,
Ghulam