Friday, 20 September 2013

Cisco IOS NetFlow - Cisco Certified Network Adminstrator (CCNA) Training Institute in Softlogic Chennai


NetFlow is a UDP -exported network profiling protocol originally developed by Cisco Systems in 1996. It enables participating devices (typically routers and switches) to report telemetry data on the network traffic flowing through them (such a device is called a NetFlow exporter). This data is sent to a downstream machine, called a NetFlow Collector:

The data can then be collated, sorted, analyzed, trended, and so on. The most widely deployed version of NetFlow, version 5, offers the capability to track the following flow data (the traditional Cisco 7-tuple is highlighted in blue):

NetFlow version 9 introduced much more power with the capability to dynamically change the packet format using templates and match on just about anything using Flexible Netflow.
If packet capture can be thought of as a wiretap, Netflow can be considered the phone bill. NetFlow allows the Network Administrator and Security Practitioner to determine:
  • Who is talking to who
  • Over what ports (or protocols)
  • For how long
  • At what speed
To know more about networking protocols, you can join networking courses at SLA IT Employment Training Company. For more details visit Cisco IOS NetFlow - Cisco Certified Netowrk Adminstrator (CCNA) Training Institute  or dial +91 86818 84318.