sFlow is a technology for monitoring traffic in data networks containing switches and routers. In particular, it defines the traffic sampling mechanisms implemented in sFlow Agents and the format of the sFlow Datagram that carries traffic measurement data from sFlow Agents to an sFlow Collector.

This module is based on the host-sflow, which is an open source implementation of the sFlow standard. It is patched by 6WIND for fast path offload.

The Host sFlow agent exports physical and virtual server performance metrics using the sFlow protocol. The agent provides scalable, multi-vendor, multi-OS performance monitoring with minimal impact on the systems being monitored.


  • packet sampling with fast path offload for better performance
  • interface statistics polling
  • sFlow v5