On 7/15/2010 6:37 PM, E-Mail Sent to this address will be added to the BlackLists wrote: > Rob wrote: >> hymie! wrote: >>> My servers are configured to use >>> server 0.us.pool.ntp.org >>> server 1.us.pool.ntp.org >>> server 2.us.pool.ntp.org >>> server 3.us.pool.ntp.org >>> >>> Through what I presume is a fluke of the DNS randomization, three of >>> my four hosts were: >>> 153.16.4.139 .INIT. 16 u 390 512 0 0.000 0.000 4000.00 >>> 153.16.4.133 .INIT. 16 u 378 512 0 0.000 0.000 4000.00 >>> 153.16.4.140 .INIT. 16 u 384 512 0 0.000 0.000 4000.00 >>> >>> I tried searching the NTP web sites to figure out who >>> maintains the NTP pools, and this was the best lead I got. >>> If these hosts are no longer offerring NTP, can they >>> (and perhaps others in that same net block) be removed >>> from the pool? > > Pool servers are babysat and removed automatically. > <http://www.pool.ntp.org/en/scores> > >> Hosts that are not offering NTP are automatically removed from the pool. >> Unfortunately, with (commonly used versions of) ntpd this DNS lookup >> is only done when it is started. So when you get 4 working NTP servers, >> it may well happen that they stop offering NTP service later and you get >> the above result. >> It can be fixed by restarting ntpd. > > Isn't this greatly improved in NTP 4.2.7p22 and later? > {When using the pool server option} > > Aren't the pool servers tossed after 10 polls without > surviving clock selection and then NTP will get IPs for > more pool servers? >
Not yet. That work is under way but it takes a lot of infrastructure work to do that. Danny > e.g. > > tos minclock 6 minsane 4 cohort 1 > > peer myNTPserverClock.example.org iburst > server myNTPserverDyn.example.org iburst preempt > server myISPsNTPserver1.example.com iburst > server myISPsNTPserver2.example.com iburst > server myUpStreamsNTPserverA.example.net iburst > server myUpStreamsNTPserverB.example.net iburst > > pool 0.us.pool.ntp.org iburst > pool 1.us.pool.ntp.org iburst > pool 2.us.pool.ntp.org iburst > pool 3.us.pool.ntp.org iburst > _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
