[ntp:questions] Sunfire X2100 and FreeBSD
Hello, I am trying to use a Sunfire X2100 system as a time server using FreeBSD 6.2. The system clock steps by tens of microseconds every few minutes with no time software running. I have not seen this on other non-Sun systems with the identical version of FreeBSD. Is this a feature of the Sun hardware? If yes, can it be turned off? Otherwise the time steps will confuse the synchronization process. Thanks. Judah Levine Time and Frequency Division NIST Boulder ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
Re: [ntp:questions] ntpdate with auth
lin_g wrote: > Hi all, > Have anybody tried using ntpdate with iff and rsa keys on the time ntpdate is deprecated. + server ? There is no problem when using symmetric md5 keys (-k and -a + options for ntpdate) but i have no idea how to force ntpdate to use the + public key for iff when remote server uses only that type of + authentication. Ntpd works perfect with that but unfortunately not ntpdate. ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
Re: [ntp:questions] drift modeling question
> A Quadratic correction tends to run away pretty badly if you suddenly > have a period of no ntp readings. But I am not at all sure that is what > you mean. Rather you seem to mean that one use the temp to estimate what > the linear drift is ( from the past readings of temp and drift.) Correct, in that the linear correction will vary with temperature (and could be matched closely by a quadratic) I am thinking of a least-squares fit to the drift data, versus temperature. Another poster mentioned that we really need temperature of the crystal, I agree, but there should be strong correlation between that (unknown) temperature and the motherboard or processor chip temperatures. ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
Re: [ntp:questions] ntpdate with auth
On 2008-07-11, lin_g <[EMAIL PROTECTED]> wrote: > Have anybody tried using ntpdate with iff and rsa keys on the time > server ? There is no problem when using symmetric md5 keys (-k and > -a options for ntpdate) but i have no idea how to force ntpdate to > use the public key for iff when remote server uses only that type of > authentication. My quick review of the ntpdate source show that it only uses symmetric keys. > Ntpd works perfect with that but unfortunately not ntpdate. Why not use ntpd, then? -- Steve Kostecke <[EMAIL PROTECTED]> NTP Public Services Project - http://support.ntp.org/ ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
Re: [ntp:questions] drift modeling question
shy author <[EMAIL PROTECTED]> writes: >> A Quadratic correction tends to run away pretty badly if you suddenly >> have a period of no ntp readings. But I am not at all sure that is what >> you mean. Rather you seem to mean that one use the temp to estimate what >> the linear drift is ( from the past readings of temp and drift.) >Correct, in that the linear correction will vary with temperature (and >could be matched closely by a quadratic) That is NOT a quadratic correction. It is a linear correction where the linear coefficient depends on temperature. >I am thinking of a least-squares fit to the drift data, versus >temperature. Another poster mentioned that we really need temperature of >the crystal, I agree, but there should be strong correlation between that >(unknown) temperature and the motherboard or processor chip temperatures. And a lag. ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
