Can you recomend a tool to see the bandwith usage of my router?

Hi Experts,

I have a Cisco 877w wireless router on my network. Is there any tool I could use to see the bandwith usage. I'm interested to know who (source IP) is the main traffic generator and what ports are using. I know that cisco ios uses netflow to get this information (export to a collector), but I have no experience with it.

Thanks in advance.
david-martiAsked:
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atlas_shudderedSr. Network EngineerCommented:
If you are looking for something quick, dirty and inexpensive, take a look at Solarwinds toolset.  Specifically their Orion Netflow Analyzer:

http://www.solarwinds.com/products/orion/nta/
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david-martiAuthor Commented:
Are some alternative to netflow to see all this information?
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atlas_shudderedSr. Network EngineerCommented:
Packet sniffing with Wireshark on your WAN - LAN uplink will give you the same information but it will need to be manipulated a little more to get the results you want.  NetFlow is the best way if I understand your intent correctly.
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CCI_ITCommented:
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fritz5150Commented:
I am really surprised that someone hasn't even suggested NTOP. NTOP will run on windows or linux, it is free www.ntop.org., and it will give you great insight into where the bandwidth is going, who is using it, and what they are doing with it.

It is far much more than just a bandwidth viewer, it can collect netflow, or sflow data from compatible routers, giving you point in time insight to your network.
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babazohaibCommented:
Here is a collection of  netflow collectors which you can use to collect your network traffic flowing through your router.
http://www.networkuptime.com/tools/netflow/
If you have experience with linux try to use NFSEN i find it the best it can give you the granuler information of even source and destination address and how much data has been exchanged.
To setup netflow on the router follow this link.
http://www.manageengine.com/products/netflow/help/cisco-netflow/cisco-ios-netflow.html

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david-martiAuthor Commented:
Thankyou to all the experts who answered this question.
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CCI_ITCommented:
prtg gives you specific interface information including current bandwidth.
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