I have a Cisco ASA 5515 running 9.1 and am interested in learning how I can see bandwidth usage by individual hosts. For instance, using MRTG I can see that my average bandwidth utilization is approx 10 Mbps with spikes up to almost 100 Mbps, and I'm trying to figure out what is causing the bandwidth spikes.
I'm looking for a way to see a list of hosts ordered by the amount of bandwidth presently being used so I can determine which hosts are using the most bandwidth and use that info to hunt down the applications generating the bandwidth spikes.
I've done some research and it looks like Netflow would give me what I'm looking for, but it doesn't appear that ASAs support Netflow.