Challenges in NetFlow Generation
NetFlow is a simple, effective way to increase visibility into traffic types
and usage patterns across systems. The flow-generated data can be
used to build relationships and usage patterns between nodes on the
network. Routers and switches that support NetFlow can collect IP
traffic statistics to be exported as NetFlow records. However the
processor and memory load of enabling NetFlow can cause service
degradation and affect their ability to pass traffic without introducing
latency and packet drops. Due to this processing overhead, sampled
NetFlow is implemented in most of the high-end routers. Sampling
one in every “n” packets for NetFlow processing can severely limit the
visibility needed to monitor flows and fail to provide a comprehensive
network trend analysis.
The Gigamon Solution
The advanced capabilities of GigaSMART technology can be leveraged to summarize and generate unsampled NetFlow statistics from incoming traffic streams. Offloading NetFlow Generation to an out-ofband solution like the Gigamon Visibility Fabric completely eliminates the risk of expending expensive production network resources in generating these analytics. Combined with the flexibility offered by Gigamon’s patented Flow Mapping technology, operators can pick and choose from the incoming flows to generate NetFlow statistics, without losing critical information. Support for NetFlow versions 5 and 9 and IP information export (IPFIX), enables seamless integration with standards-based collectors. NetFlow records can also be exported to multiple collectors concurrently, providing a single flow source for business-critical management applications such as security, billing, capacity planning, and more. Pervasive flow-level visibility across remote locations and Big Data environments can be used to derive accurate statistics such as usage patterns, top talkers, and top applications for effective capacity planning and enforcing security policies.
NetFlow-based data is summarized information and does not provide access to specific set of packets or packet payloads. Not having this information can also impede analysis around latency and jitter, application usage patterns, etc. Gigamon’s Visibility Fabric architecture is the first in the industry to summarize flow statistics as well as to provide the flexibility of aggregating, replicating, filtering, and forwarding raw traffic streams to monitoring tools for detailed troubleshooting and analytics. The Gigamon Visibility Fabric thus establishes a scalable framework to deliver pervasive flow-level visibility across enterprises, data centers, and service provider environments to accurately design, engineer, optimize, and manage their network infrastructure.
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In addition to this blog, Netiquette IQ has a website with great assets which are being added to on a regular basis. I have authored the premiere book on Netiquette, “Netiquette IQ - A Comprehensive Guide to Improve, Enhance and Add Power to Your Email". My new book, “You’re Hired! Super Charge Your Email Skills in 60 Minutes. . . And Get That Job!” will be published soon follow by a trilogy of books on Netiquette for young people. You can view my profile, reviews of the book and content excerpts at:
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