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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Are you thinking about migrating to Flexible NetFlow (aka FnF)?   If you are, you are probably aware that FnF brings the following to NetFlow:

• NetFlow NBAR for application recognition
• Performance Monitoring “Cisco Medianet”
• Layer 2 information
• Export to unlimited collectors
• Much more…..

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NetFlow has come a long way in the last few years.  For example, here’s a list of some new information that can now be monitored and filtered on by exporting NetFlow or IPFIX packets from your routers, switches, and firewalls.

•    Medianet
•    Host/Application Latency
•    VoIP with Caller ID
•    Configuring Cisco ASA NetFlow Exports
•    NBAR
•    URLs
•    Mac Address and VLAN

Now that’s a whole lot of information that you can get from your NetFlow Analyzer!

So what is all this new information?

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We recently received a request from a customer looking for a way to identify GoogleTalk (gtalk) traffic.  To address this request, we first needed to learn about this protocol.  It seems that GoogleTalk uses an existing protocol called “Jabber”, which is based on XMPP.  To simplify things, Jabber uses a standard port of 5222.

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Looks like WAAS Express NetFlow support is in the works at Cisco.  The Flexible NetFlow (FnF) support will be available in 15.1(3)T on the Cisco ISR-G2. Features include:

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Configuring Flexible NetFlow NBAR has been discussed in our blogs before, but it’s still such a hot topic, I thought it warranted more coverage.

With NetFlow v9 Flexible NetFlow support, configuring the export of NBAR information to your NetFlow collector is simple to do by following these four steps.
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Had a customer call in the other day with a NetFlow Billing question. Apparently his Cisco router is sending over 50,000 flows per second during peak hours.  This is some serious high volume NetFlow. His fancy expensive NetFlow collector couldn’t handle the volume and so we were one of the vendors he turned to.

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The nProbe configuration portion of this blog has been depreciated by the release of nProbe v6.1.1.  Please see our Recommended nProbe Templates blog for the most recent configuration.

The question, “How do I configure nProbe to export URL and Latency information?” has started to come up more often in support, so I want to take the time to demonstrate how to configure nProbe and how to analyze URLs and latency with NetFlow.

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Last week we released a new version of our NetFlow and sFlow Analysis tool. Included in the reporting engine in Scrutinizer v8 is an advanced filter that lets you filter any report for any field found in the NetFlow template. Scrutinizer is currently the only product on the market that lets you do this.

With Flexible NetFlow (FnF) and user defined templates, you have the ability to export layer 2 information such as MAC address, fragment identification and VLAN ID’s.

Using the Advanced Filter function in Scrutinizer v8, we can filter on those layer 2 user defined fields.

Lets see how we can filter a conversation report on a MAC address and then exclude an interface from the report.

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We are getting some calls with questions regarding how to setup the Nexus 1000 and Nexus 7000 to export NetFlow.  I wrote a blog for Brad Reese awhile back on How to configure a Cisco Nexus 7000 to export NetFlow v9.  Read more »

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