On 2019-03-21 2:06 a.m., Rutvij via Ryu-devel wrote:
              I am working on Network Resiliency with SDN for Industrial CPS. I need to find end-to-end delay with timestamp method by inserting timestamps into UDP when it enters the first switch and leaves the last switch. We use linear toplology. We use Ryu+Mininet and generate UDP traffic with iperf3 May I know how to carry out this task?

You may want to look at PTP Precision Time Protocol IEEE 1588:

https://en.wikipedia.org/wiki/Precision_Time_Protocol

You need to look for nics and switches which can handle the protocol. That would be the most reliable time stamping capability native to network operations.

Raymond Burkholder
https://blog.raymond.burkholder.net


Thanks & Regards,

Dr. Rutvij H. Jhaveri <https://sites.google.com/site/rutvijhjhaveri/home>
Postdoc Research Fellow
Delta NTU Corp Lab,
S2-B3c-13, 50 Nanyang Ave,
Nanyang Technological University,
Singapore 639798


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