I have a network connection between 3 computers sharing the same net bandwidth with the same router (modem), I wanted to know how much every one of this network taking from the bandwidth, I want an easy program like switch-sniffer (see the pic) to scan the network and tell me how much every one taking from this network in real time.

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Screenshot-1.png (57.1 KB, 17 views)

You can use ntop to see who are using internet for what?

http://www.ntop.org

yeah I have tried ntop, iptraf, wireshark, iftop and others but I didnt get how to make them work to monitor the other hosts on the network and how much they take from the bandwidth.

If it is possible like this (http://www.ntop.org/news.html).

I didnt understand
I want something like the one on my screenshot or something near

any other suggestions please

What sort of router do you have?

I use a Linksys WRT54GL, with DD-WRT (Linux based), and simply run Cacti on one of the PCs. The router exports SNMP data, which Cacti graphs to show total bandwidth utilization as a graph.

This router also has the ability to export Netflow information, which can be captured and analysed.

Many routers would have similar functions.

--Ian

I use a TP-LINK router but I think that this option is not here, can you Tell me how to know do this is supported by the router or not, and how I search on the net for that?

any other suggestion guys ??

Never heard of a TP link router so can't help you there with specifics;
you can either Google dd-wrt and use those websites to see if dd-wrt is compatible with your router,
or
You can, just assume that your router has snmp capability and run Cacti (from above),
or
you can contact your Router mfr tech support and see what you need to do to enable SMMP on your router.

Hope this helps

I have this in the router page (see the attach), but I dont know what to do next
sorry I am not a pro in this things, can you help me to the next step?

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Screenshot-TP-LINK ADSL Router - Mozilla Firefox.png (121.3 KB, 7 views)

Just shooting from the hip, but it looks like you could put a dot in ENABLE and an IP address of the computer you are going to install cacti on and save the settings.
Then google cacti and when you find the site to download from, read the docs available there and then do the downloac to your PC.
Having enabled SNMP on your router it should be transmitting SNMP traps/data and so when you download cacti and start it up it should start displaying network traffic.
So there are five steps
1. Read Router documentation relating to SNMP configuration
2. Configure SNMP on your router
3. Google and Read SNMP
4. Google and Read Cacti install and operation
5. Install and configure Cacti

I dunno what to say more than thank you john test
I will try what U have said

You are very welcome.

You probably don't need to have a Trap manager IP. I don't know what this is, so it is quite likely unnecessary.

Basically, just enable SNMP on that screen and Save the settings.

Then install Cacti on your Linux box. Cacti is fairly straight-forward, and there is heaps of documentation.