Today I will discuss the command “ip flow ingress infer-fields”, mostly used in the NetFlow configuration of NetFlow switches. Being the newest member of the Plixer International Tech Support team I am discovering how amazingly large certain networks can get. This is when an outstanding network monitoring and diagnosis capability come in handy. Read more »

Daniel Senga
Tech Support
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Sampled NetFlow provides NetFlow statistics for a subset of incoming (ingress) IPv4 traffic on an interface.  Output Sampled NetFlow allows you to collect NetFlow statistics for a subset of outgoing (egress) IPv4 traffic on that interface.

The Output Sampled NetFlow feature is now available starting with IOS 12.0(24)S for IPv4 traffic on Cisco 12000 Series IP Service Engine (ISE) line cards.  In IOS 12.0(26)S, this feature was enhanced to report the input interface and support for the Cisco 12000 Series 4-Port Gigabit Ethernet ISE line card was added.

Which means that you can now export both ingress and egress Sampled NetFlow for Cisco 12000′s!
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Why do you want to know what is going on in the traffic flow of a network?

What’s the point?

Why doesn’t utilization alone cut it?

Network Administrators don’t typically have a lot of time on a day-to-day basis. There is always some fire to fight, some network or user issue that comes up. Most times your juggling more than one issue at a time. So you find yourself spending most of your time trying to keep the network running and the users happy.

A Network Administrator’s abilities are only as good as his awareness of what happens on his network.

Monitoring and maintaining your network traffic and bandwidth utilization used to be an overlooked aspect of your job. But evolution of technology has changed the makeup of networks everywhere and has forced network managers to include Flow analysis and monitoring in their network management strategies.

Network Flow Analysis is the art of studying the traffic on a computer network. It is the  industry-standard method of collecting and recording network traffic. Flow analysis lets you see what types of traffic passed between hosts, without having to reproduce the problem.

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For those of you that missed Plixer’s recent series of webinars, aimed at getting the most out of NetFlow using their latest and greatest NetFlow and sFlow analyzer, there is still hope. A recording of the webinar has been made available online for your viewing pleasure. Just click the image below to watch this 40 minute presentation.

Michael Patterson, Scrutinizer Product Manager, covered a range of topics in this traffic monitoring centric presentation.

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Jon Mills
Marketing & Public Relations Manager
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Working in technical support I get asked a lot, “I enabled NetFlow on my router, why don’t I see outbound traffic?” This is because NetFlow version 5 only supports ingress flow monitoring and they don’t have NetFlow enabled on all interfaces. In NetFlow v5 outbound traffic is calculated by the idea what goes in must go out (or stop at the router) so, it’s necessary that all interfaces are monitoring ingress traffic to get an accurate representation of outgoing traffic. So, if ingress monitoring has been working great all along why enable egress monitoring?

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Paul Dube
Technical Support
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Most of my blogs are related to NetFlow or sFlow.  This weekend I’m taking a break from network traffic monitoring.  My father in law, some friends and I took off snowmobiling up in Sherman, Maine.

I have so many trade show shirts that I end up wearing them on events like this from time to time. I couldn’t resist this picture below.  Funny thing is, I’ve had people approach me in restaurants when they see my t-shirts for Cisco, Nortel, etc. Read more »

Michael Patterson
Scrutinizer Product Manager

If you missed the NetFlow training webinars Plixer offered over the last three days, then feel free to watch the recording we made of Thursday’s presentation. The webinar, which covered Cisco ASA and NBAR NetFlow reporting, was presented by Scrutinizer NetFlow & sFlow Analyzer Product Manager, Michael Patterson.

As always, keep an eye out for emails from Plixer for future webinar invitations. We also try to post many of these signups on our blog. Thanks for watching!

Jon Mills
Marketing & Public Relations Manager
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Join one of our upcoming webinars on Cisco ASA and NBAR NetFlow Reporting. Agenda - Cisco NetFlow: Intro and how to report on it. - Cisco ASA NetFlow exports and how to interpret the data. - Cisco NBAR reporting for layer 7 application reports (e.g. who is using: Skype, kazaa2, RTP, etc.). Register for one of the times below » Tuesday, Dec. 15 @ 11am EST » Wednesday, Dec. 16 @ 9am EST » Thursday, Dec. 17 @ 1pm EST

Jon Mills
Marketing & Public Relations Manager
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Since the launch of our Systrax community website, we have written over three hundred blogs and generated two unique cases of Carpal Tunnel to bring you informative and sometimes quasi entertaining content.

I think its time though to lasso in some of the highlights over the year into one summary blog for quick and easy reference. This blog will link to others that have answered some of the more commonly asked questions. We hope you enjoy it.

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The holiday’s are nearly upon us, and in the spirit of giving, Mix Master Mitch has graced us with his latest rap video. This time around, Mitch decided to focus on setting up NetFlow on a Cisco Catalyst 6509 switch. Take a look.

Read the lyrics

Mix Master Mitch was also kind enough to give Systrax an exclusive interview. It was hard to pull him away from his legion of screaming fans, but he managed to sneak off for a few minutes to give us his insight on his latest creation.

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Jon Mills
Marketing & Public Relations Manager
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