whose using bandwidth

we're trying to determine who w/in our network is using our available bandwidth. how can we do this?
mdmcq5Asked:
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inthecurveConnect With a Mentor Commented:
An easier way is to institute QoS on your network and set up quota's/limits for users.  Either someone will notify you that they are having issues or the high bandwidth will stop when they realize you are now throttling down everyone's consumption.
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DifladermausConnect With a Mentor Commented:
You should have some utility to check port through put for your switches. Do you have a network admin to work with? What type of switches are you  using?

Dif
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mdmcq5Author Commented:
none of our switches are managed switches...
I can ck for some bandwidth through our sonicwall, and it's actually listing a high bandwidth for an IP that's dead...?? but we can't quite pinpoint whose using the bandwidth...we've contacted our provider and they've run tests on the equipment, all with a passing grade of course...but our traffic is super sluggish...we've rebooted everything..
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inthecurveCommented:
Sounds like you may have had your network attacked and compromised.
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mdmcq5Author Commented:
how can we stop it? what do we do?
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inthecurveCommented:
I would try something a little unorthodox first, like physically routing that "dead" ip back to a known unallocated IP on your network.  Creating a "black hole" for the requester.  I am not saying this will fix your issue, only help either stop the misuse or identify further the issue.
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mdmcq5Author Commented:
the  dead ip has now disappeared..
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mdmcq5Author Commented:
I think everyone may have started panicking for no reason...After doing a complete turn off and reboot of everything at once, rather than this here and there - all is back to normal.  Think perhaps someone somewhere was bottlenecking everything
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