Slow Net Bandwidth

[dave68]

I am looking for a program to search the network (Over 200 PC's) to find the culprit that's using up the bandwidth ,

Our office 1.2Mbps Bandwidth drops to 32kbps and lower at times , I think that someone is downloading lots or we have a Virus or some spyware on the network.

 

[bilbus]

I use MRTG to monitor our sites bandwidth, but for each PC thats kinda hard unless you have managed switches.

The best way is to run ping 198.6.1.2 /t on a laptop pluged into network (near your rack or switching core)

watch the pings and unplug one switch at a time to figure out what computer on what switch is using up all the bandwidth (the ping will go back to a fast speed when you unplug the correct switch) Then on the switch unplug each connection until you have the same result. You will find the correct one in just a few mins.

I did this a little while back on a fairly large network, took less then 30 mins