Did you ever consider that using Flexible NetFlow, specifically an NBAR NetFlow configuration, could provide another aspect of network security for you? Exporting NBAR (Network Based Application Recognition) in Flexible NetFlow records provides the opportunity for deep packet inspection visibility in NetFlow reporting. Once you have that visibility, you’re just a half step away from …
What is the preferred Cisco NetFlow Port Number to listen on? Well, it depends. The NetFlow RFC 3954 does not specify a specific NetFlow listening port, however, in my experience 2055 and 9995 or 9996 are the most popular. Fortunately, our NetFlow solution, by default, will listen for any NetFlow/sFlow traffic sent to it on …
We figured out how to report on packet length with NetFlow. All you have to do is enter “match ipv4 length total” in the flow record of the Flexible NetFlow Configuration . This entry will export the element ipTotalLength whereby the NetFlow and IPFIX reporting tool can provide reports that look like this:
Most businesses want to take network traffic management to the next step and luckily the IT Gurus within these same companies are already familiar with NetFlow but, what about Flexible NetFlow? In order to get deeper details on not just the volume of critical apps on the network but, also the performance of the applications, …
Network Traffic Management : Cisco NBAR and Performance Monitoring Read More »
Today I’ll cover the importance of VoIP DSCP prioritization when NetFlow reporting. We have 3 employees that work remotely in Central Maine, Pennsylvania, and Florida. They all have Cisco routers and are exporting VoIP data to our NetFlow Analyzer server. Read the Cisco Medianet Deployment Guide to learn more about setting this up.