What is NetFlow Telemetry for Network Traffic Monitoring?  It’s a type of automated measurement that provides visibility into your network that is provided by NetFlow, sFlow, or IPFIX.

NetFlow Telemetry can incorporate not only great reporting, but also intrusion and network threat detection.  The key differentiator is ‘automation’.  Our network threat detection is automated: Read more »

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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.

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NetFlow v5 gave us great insight into network traffic, then NetFlow v9 gave us more, then Flexible NetFlow was more, well, flexible, and, now I ask, “How does IPFIX vs NetFlow compare?”

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Do you need an Enterasys NetFlow Collector?

Well, if you have Enterasys S-Series switches exporting Hi-Fidelity NetFlow, adding advanced NetFlow analysis to your network management toolset increases the value of that investment.

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As we approach the end of 2011, I’d like to take this time to recap some major advances in NetFlow & IPFIX reporting.

Several notable NetFlow developments for 2011 from Cisco Networks are:

• Medianet Network Performance Monitoring
• Cisco TrustSec (CTS) NetFlow support
• Cisco Smart Logging and Telemetry (SLT)

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Cisco Systems, Inc. has released a new feature, the NBAR Protocol Pack, which provides an easy way to load multiple Protocol Description Language (PDL) files at one time. Read more »

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Expanding on part 1 of the Configure NetFlow v9 for Cisco 4500 Sup7e blog, today I’ll be exploring what changes are needed to the Flexible NetFlow configuration if the data received by your NetFlow collector is understated.

As I was working with one of our Australian customers, the NetFlow data did not look right, specifically the bandwidth utilization was understated.  Vastly understated.

We reviewed the Flexible NetFlow configuration on the 4500 repeatedly and found nothing out of place or misconfigured.

Indeed, the FNF configuration was fine, but it didn’t account for the extremely high volume of flow data through this particular switch.  To the extent that the NetFlow cache entries table was overflowing. Read more »

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How do you configure NetFlow on a Cisco XR 12000 or Cisco ASR Series router?  I have been asked this question lately so I thought I would share this with you today.

The NetFlow infrastructure is based on the configuration and use of the following maps:

• Exporter Map
• Sampler Map
• Flow Monitor Map

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Are you looking for NetFlow configuration help for the Cisco 4500-E, 2960, 3560, or 3750-X series?  Well, you’ve come to the right place then!

Several months ago I blogged about configuring the Cisco 4500 Sup7e for NetFlow v9 and have since had calls asking how to configure a 4510 or 4503.  Hmmmmmm…… I had blogged about that, but hadn’t included all the models it applied to.  So if you have any of these devices:  Cisco 4503-E, 4506-E, 4507-E, or 4510R+E, you should check out my blog on Cisco 45xx-E NetFlow configuration.

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Cisco’s Catalyst 3750-X now has NetFlow v9 support!!

Using the 3KX module pictured below, you can now configure Flexible NetFlow exports on the 3750-X.  To find out how, just read on…..

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