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View Full Version : Network Bandwidth and what is this?


AmRivlin
02-01-2002, 03:05 PM
I live in a dorm, our netadmins freak when we suck bandwidth.
Green=our upload
Blue=our download

They have it capped and filtered so certain files get priority, below is a graph that is wierd. for a 24 hour period someone went crazy? Anyone have any ideas what spikes upload every 15 min. I thought it was me and my webcam. But not so, i disconnected my CAT 5 at 12am (0)because I was afraid I was busted.

http://aalto.arch.ksu.edu/AMRivlin/day.png

This next image show previous traffic and its avg use. (Except for Friday.)

http://aalto.arch.ksu.edu/AMRivlin/weel.png
DoPeY5007
02-01-2002, 03:32 PM
well how many people is that graph for???...
AmRivlin
02-01-2002, 03:34 PM
A hall of 500, yet could be that not everyone uses the router... The week pic is typical usage the green spikes are wierd
Blu
02-01-2002, 03:37 PM
Someone may have setup limits on the uploads on a hourly basis. So when the time limit is up, someone who is sending a huge file quickly sends as much data as fast as the network allows, resulting in the spikes.
DoPeY5007
02-01-2002, 03:43 PM
Originally posted by Blu
Someone may have setup limits on the uploads on a hourly basis. So when the time limit is up, someone who is sending a huge file quickly sends as much data as fast as the network allows, resulting in the spikes. that makes sence
AmRivlin
02-01-2002, 03:44 PM
Possible, but unlikely, I see the upload limit, yet why this sudden 12 hr surge, wouldnt you get annoyed after a few min of delay and cancel... Also I have uploaded at a constant much higher with out stops.
Jeffbx
02-01-2002, 05:41 PM
Could also be some moron with an e-mail or IIS virus - the spikes could be the virus propagating itself.
AmRivlin
02-01-2002, 05:44 PM
thats alot of propagation. Good thing I am locked down!
Kevster
02-02-2002, 06:54 PM
That's a good question - interesting though that your netadmins use Statcast for their monitoring/graphing.

Statcast is not a very good program for trend analysis - I know because my company stopped using it a year ago. Your graph shows a sample every 10 minutes - the number corresponding to the graph is not an average, but a snapshot of the utilization every 10 minutes. This is NOT good for trend analysis since it does not show you what is happening the other 9 minutes 59 seconds of the period.

Whoever is using your segment like that is sending every 30 minutes or so. He could very well be sending for 5-15 minutes like that. It definitely looks like it is an automated process so who knows what it could be. Got a sniffer?