"David L. Mills" <[EMAIL PROTECTED]> writes: >Brian,
>The longest delay NTP response was from the Moon, as simulated at JPL. >Next step is the Mars orbiters and then the rovers. JPL discovered the >max distance threshold had to be increased to handle the Moon delay. Thats only a few sec. And it is symmetrical. Could probably still get usec resolution. >The longest lived NTP headbanger was when I used ARPAnet IMP 29 back in >the late 70s. The banger continued without response until the ARPAnet >was dismantled in the early 90s. There are folks that have been banging >on our racket.udel.edu at its 128.4.1.1 address since 1981. >So far, not response has arrived before the request was sent. The code >even checks for that. I'll let you know. >Dave >Brian Utterback wrote: >> David L. Mills wrote: >> >>> Suspecting such could be the case between NTP servers and clients, I >>> designed an experiment to detect such things and found small but >>> significant LRD effects with lags up to TWO WEEKS! At short lags up to >>> several network turns this can be explained by packet lengths, >>> buffering, retransmissions, etc., but at much longer lags you have to >>> look for routing flaps, provisioning changes, etc. >>> >> >> Dave, are you saying that you saw an instance of a NTP response arriving >> 2 weeks after the request was sent? >> >> Brian Utterback _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
