Re: delay calculation
Nicolas Schmerber wrote:
Hello,
I'm new in networking and iperf usage. And I need a little bit help.
For a script project I must get this values from site A to site B :
Jitter delay, %loss pkts, and delay (not simple RTT)
I get easyly the 2 first parameters, but one thing : iperf gives
jitter delay but not the delay (time to go from A to B)
Is there a way to calculate this ? A simple "ping" is not enough as
the A <--> B line is asymetric so with a ping the time to A --> B isnt
the same as B--> A .
Thanks for any help and sorry asking newbie questions.
You could time synchronize the 2 systems then send a timestamped message
but I am not sure if you would get the resolution required using
somthing like ntp.
Alternatly you could use very small ping packets and in that way
minimize the component of your RTT that is purely related to the baud
rate of the lines.
It should be possible to use various sized pings to bckward extrapolate
the delay and somebody has likely done it somewhere and written it up.
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