I did a prototype for that by modifying the lldp app.
I did work as a proof of concept. One bad thing is that the measurements
are not really reliable.
I've also seen papers of people doing the same thing with other controller
so it should be possible. Just understand that make it reliable is a good
challenge.
Flávio Castro Jr.
MSCS student at Georgia Tech
B.S.E in Networks Engineering from the University of Brasilia.
CCNA Certified
(404) 660-9373
On Fri, Mar 27, 2015 at 12:07 AM, YAMAMOTO Takashi <[email protected]>
wrote:
> hi,
>
> afaik, there's no existing ryu apps which do that.
>
> just an idea:
>
> a. controller-switch latency can be measured using echo requests.
> b. controller-switch-switch-controller latency can be measured using
> packet-out/in.
>
> (b - 2 * a) might be what you want.
>
> YAMAMOTO Takashi
>
> > Hi,
> >
> >
> > I attempt to work at QoS experiment and Monitor the network resource in
> RYU controller. However,I don't know how to measure the link delay in RYU.
> Does RYU support to measure the delay for every link ? How should I do ?
> >
> >
> > thanks
>
>
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