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Home > Success Center > Netflow Traffic Analyzer (NTA) > NetFlow data from Arista switches

NetFlow data from Arista switches

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Updated January 18th, 2018

Overview

This article briefly discusses NTA support for NetFlow data sent to the collector from Arista switches.

Environment

All NTA versions

Detail

Arista switches use sFlow technology to export flow data.  sFlow sends out two types of samples, Flow Samples and Counter Samples in the flow data.  SolarWinds Netflow only supports  Flow Sample type of flows since it contains additional Layer 3 information like source and destination IP Addresses.  Counter Samples consist of interface counter information which is not currently supported by NTA.  There have been some reported instances where the majority of the flows being exported by the devices are Counter Samples with very few Flow Sample flows.  This causes Netflow graphs to show very little flow data compared to interface utilization. This can be confirmed by performing a Wireshark capture and investigate the flow data.  Refer to the Arista switch manual. (© 2018 Arista Networks, Inc, available at https://www.arista.com, obtained on January 5, 2018.)

 

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