[ntp:questions] NTP request retry?

Harlan Stenn stenn at ntp.org
Tue Jan 28 00:55:26 UTC 2014

Brian Utterback writes:
> On the other hand, I have definitely observed that phenomenon as a 
> source of asymmetric round trip time. The outgoing request packet gets 
> delayed for ARP request and reply at each hop, but the return packet has 
> no such delay. Quite a while ago I suggested a special burst mode where 
> two packets were sent, one shortly after the other and the first one 
> would be ignored. Dr. Mills said that the first would generally be 
> ignored because of the longer round trip time (delay), but I thought 
> that treating the first packet as a throw away would be better because 
> otherwise you end up with half the number of "good" samples in the 
> billboard. Anyway, nothing every came of the discussion.

I'm game to see this discussion warmed up.


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