[ovs-discuss] Detecting Elephant flow.

[Peter Phaal]

One way to detect Elephant flows on OVS is to enable sFlow on OVS. The following article 
provides an example of Elephant flow detection and marking using OVS / Mininet:

http://blog.sflow.com/2014/04/mininet-integrated-hybrid-openflow.html

There have been some experiments described using patched versions of OVS to detect 
Elephant flows (although I don't believe the patches have been made public yet):

http://blogs.vmware.com/networkvirtualization/2014/02/elephant-flow-mitigation.html
http://etherealmind.com/elephant-detection-virtual-switches-mitigation-hardware/

The sFlow standard is widely supported by data center switch vendors, providing visibility from gateway devices
virtualizing physical servers, and extending visibility from the edge into the physical fabric to provide end-to-end visibility 
to support Elephant flow load balancing etc.

Peter

On Jul 28, 2014, at 6:39 AM, Bhargav Bhikkaji <bhargav.ietf at gmail.com> wrote:

> How do one detect Elephant flow on OVS ?. Is there a configurable value, if so, can you provide more details ?
> 
> Thanks
> Bhargav
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