We’ve blogged about the differences between NetFlow and sFlow before but this debate continues to come up often enough and has been going on long enough that it needs to be put to rest once and for all. So let’s cut right to the chase:
PSAMP is what allows the Catalyst 4948E to support NetFlow-Lite and it is the first switch from Cisco to support IPFIX. This feature demonstrates Cisco’s commitment to IPFIX, a protocol slowly gaining ground on Cisco’s NetFlow in popularity. The main difference being that IPFIX is the proposed flow standard in RFC 5101 and 5102. Did you know that Cisco is one of the major proponents of IPFIX? Read more »
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Are you looking to configure a Catalyst 4948E to export NetFlow-Lite? In this post we will share the configuration necessary to make it work. BUT first, I thought a few of you would also be interested in some background information about the NetFlow-Lite technology.
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I personnally believe NetFlow v9 and now IPFIX are two of the greatest, if not the greatest, revolution in network traffic monitoring. It makes a substantial amount of usefull traffic information available to the network administrator. However, to truly take advantage of NetFlow, a software with powerful reporting capabilities is required. Today, I would like to talk about our NetFlow Analyzer data filtering capability. Read more »
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In this blog I would like to go over how to enable sFlow on Fortigate switches. Supposed we want to configure a Fortigate device to export sFlow, for instance, to a server 10.10.10.10. This server is listening for flow packets on port 2055, and we want a sampling rate of 1 for every 2000 packets.
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Uptime Software provides Mid-Enterprises with Deep, Affordable, and Easy-to-Use IT Systems Management. They chose to integrate Scrutinizer, Plixer’s NetFlow analyzer, into their Network Monitoring solution. Check out the list of monitoring abilities.
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Not seeing the interface utilization you expect to see from your Juniper EX4200 sFlow exports?
I was working with a customer exporting sFlow from an EX4200 to his sFlow Analyzer and was seeing extremely low utilization, even low for a sampling technology.
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It was my last free day in London and I bumped into one of our favorite Time Lord’s worst enemies. Trust me, I would have much rather spent the day having fun, running around London, but this was serious!
With the words “Exterminate, Exterminate” ringing in my ear, I decided that the only way to save the human race was to find The Doctor. London is a big city and a bit foreign to me. I needed to find him and fast. I first stopped at Starbucks. A quick double espresso with an extra shot was what I needed. It could be the end of the world, no time to mess with tea.
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Join the NetFlow Developments group on LinkedIn.
If you’re a faithful follower of our blogs, then you are familiar with the “samplicator” described in Michael Patterson’s “Free NetFlow Forwarder or NetFlow Duplicator” blog from May 29th, 2010.
If you’re not familiar with this NetFlow Forwarder application and you have the need for exporting NetFlow packets to multiple (unlimited!) collectors, then you must read his blog.
With switches or routers that do not support NetFlow export to more than one NetFlow collector, or if you have the need to export to more than the typical two collectors, the samplicator is an ideal solution.
Configuration is quick and easy and, if using the config file to list source (exporters) and destinations (collectors), extremely scalable.
There is no doubt that flow technology is revolutionizing network monitoring. In this NetFlow/J-Flow/IPFIX/sFlow era, there is no need to settle with only knowing utilizations on the network. Besides, little analysis can be done in monitoring bandwidth only anyways.
Scott wrote a blog earlier that made a valid point: “A Network Administrator’s abilities are only as good as his awareness of what happens on his network.” In harmony with that statement, it’s beneficial to have useful tools to be able to collect that traffic information.
Recently, I learned that J-Flow is supported for the Juniper SRX series Gateways. I thought this might be good information for people who want to start monitoring flows on this type of device, especially our NetFlow and sFlow Analyzer users, since it can also process J-Flow packets. Below are some sample commands taken from Juniper’s Knowledge Base which walks you through your J-Flow configuration. Read more »
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