Looking for realtime bandwidth usage on my network

I am looking for a solution, either cloud based, or preferably a local, hosted program, that will show me in real time the network bandwidth usage by each user in my network.
I have cisco 2960S and 3750G switches, and a 4948 for my core.  Basically, when my network is slow, it's usually because one or more individuals are downloading or uploading gigs of data, and I need to pinpoint that any time of the day.

My firewall shows me the bandwidth used for for day, but not in real time, so that doesn't help me much.

Any suggestions?
DanNetwork EngineerAsked:
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fred hakimRetired ITCommented:
I have not used this, but I have used other tools from Solar winds.  They offer a free version too...

see:  https://www.solarwinds.com/free-tools/real-time-bandwidth-monitor
Jenaraj JenIT Systems EngineerCommented:
take a look at this aswell,

its free for up to 100 sensors and their support is top notch!



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DP230Network AdministratorCommented:
You can use Zabbix, it's totally free. You can see here the real time traffic in my Switch Core cisco 3750, on a interface which is connected to Router 1

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DanNetwork EngineerAuthor Commented:
Regarding solar winds,  every time I downloaded any of their tools, there are limitations, like only able to monitor 5 devices, etc....  So it's not very useful, as it doesn't do me any good to only monitor 5 of my switches.  But, I will give this another try and try it out.

Regarding PRTG,  it's funny you mention that, I am actually using PRTG, I have a 1000 license, and for the most part, it's pretty good, but it doesn't do a good job on bandwidth monitoring.  It does have sensors for bandwidth monitoring, but the problem is, the sensors are per switch, so since I have 16 switches, I would have to scan all 16 switches, and check which port is using a large amount of bandwidth.  The data is for a port number, so when I have to figure out on the specific switch in question, and then the port in question.   So I do have other software that will help me pin point what devices are connected to each port on my switches, but it's a 5-10 min process.  

So I'm looking for something that shows me the users, including IP and MAC, in one screen, that I can sort by bandwidth utilized in real time.  Of course the more info it has the better,  like on what switch/port it's connected would be great.

I have tried others, and they don't seem to do what I'm looking for.

I have not tried Zabbix, so I can try that next.
DanNetwork EngineerAuthor Commented:
Fred, the realtime bandwidth monitor is a joke. You can only add one device at a time.  Second, it only shows you the bandwidth per port, and you can't drill in on the traffic.  This app is useless.  who's going to manually add each device one by one, as each port comes up in a separate screen, so since I have 16 switches, and I'm looking at about 300+ ports, I would have about 300 DIFFERENT SCREENS TO MONITOR.
Also, it doesn't do me any good to find out what IP or dns name is using how much bandwidth, as it just shows you the bandwidth per port, not per user, again, utterly useless product.  I guess if I only had 1 switch, that might work, but even then, why would I want to look at 24 or 48 different screens.
DanNetwork EngineerAuthor Commented:
Tjno, so since it's open source, how complicated is to configure?  I tried using Naggios years ago, and it was painful to setup and configure.
I don't have hours/days/weeks  to waste to figure out how to use the software.  There's a reason why it's free.   In your screenshot, I don't see a list of IPs/DNS names, as I already am using PRTG to monitor my switches, I just need something that shows me in one screen, the bandwidth by user/IP, so I can sort ascending, so I can see at a glance, anytime who's using the most bandwidth.
DanNetwork EngineerAuthor Commented:
thanks for your input guys.
DP230Network AdministratorCommented:
@Dan: yes it takes a bit of time to configure, but not too difficult. There is also an appliance on their website, you can just download it as iso file and boot to a server
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