![]() ![]() Since the protocol was first introduced by Cisco in 1996 it has been updated numerous times in a series of backward-compatible versions, the most commonly used of which are versions 5 and 9: The fields that make up a NetFlow flow record depend on the version of NetFlow supported by the NetFlow exporter. xFlow, while not a variant, is the generic term often used to refer collectively to all flow record variants (NetFlow, sFlow, IPFIX, J-Flow, etc.).– J-Flow from Juniper Networks, which essentially conforms to NetFlow v5 Other vendor-specific flow record formats that are similar in nature to one of three most common variants listed above (in most cases these are either substitutions or very close adaptations) include:. ![]() It relies on accurate and reliable statistical sampling methods for documenting flows, thereby reducing the amount of flow information that ultimately needs processing and analysis. sFlow does not sample all packets like NetFlow does, nor does it timestamp traffic flows.
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