Right now we are using OpenNMS to get alerts and traffic view for our All Cisco network. I want to deploy deep packet inspection product to have more idea about top talkers, application response time and application bandwidth usage, etc. I don't want to utilize netflow in router and switch. Kind of worry put more load on the device. I would like just setup SPAN or use tap to mirror the traffic and the monitoring device can analyze the traffic or capture the traffic.
Does anyone use ntop's product like nBox, nProbe, Recorder? I know there are lots of netflow analyzer software, but I don't want to configure netflow in Cisco. We would like try cheaper solution before we go to the expensive commercial ones. The throughput I will monitor is around 500Mbps.
Any recommendation? Really appreciated!