I am looking for a way to monitor top bandwidth users on a certain switch. The Cisco ASA can monitor what IP addresses are using how much bandwidth, is there a way to get PRTG to pull that information out? Is there another way to get such information without using packet sniffing / port mirroring?

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PRTG brings a sensor called SNMP Traffic that can be used to monitor the traffic on the different port of a switch. There is also sensor called SNMP RMON that provides some more information for every port of a switch. Both sensor will show the total traffic, no matter if it is LAN or internet traffic. If you want to know who causes the most traffic to the internet, you will need to use packet sniffing / port mirroring.

There is one other possibility. You can take a look at the mibs, cisco provides for your asa. Maybe, one of them will contain an OID, that provides those information. You can then use the mib importer to add the mib/oid to your prtg.

Here is a link to a knowledgebase article, that describes how to use the mib importer.


Jun, 2012 - Permalink

As of PRTG 12, there also three native sensors available for a Cisco ASA:


May, 2014 - Permalink