NTP

  1. Bug #787551
  2. Comment #6

Comment 6 for bug 787551

Revision history for this message
In , Rose-g (rose-g) wrote :

We have a rather slow inhouse timeserver:
root@cheetah:/home/rose(53)# ping 10.101.10.20
PING 10.101.10.20 (10.101.10.20) 56(84) bytes of data.
64 bytes from 10.101.10.20: icmp_seq=1 ttl=127 time=6.88 ms
64 bytes from 10.101.10.20: icmp_seq=2 ttl=127 time=1.22 ms
64 bytes from 10.101.10.20: icmp_seq=3 ttl=127 time=2.15 ms
64 bytes from 10.101.10.20: icmp_seq=4 ttl=127 time=0.538 ms
64 bytes from 10.101.10.20: icmp_seq=5 ttl=127 time=87.9 ms
64 bytes from 10.101.10.20: icmp_seq=6 ttl=127 time=6.77 ms
64 bytes from 10.101.10.20: icmp_seq=7 ttl=127 time=7.13 ms
64 bytes from 10.101.10.20: icmp_seq=8 ttl=127 time=1.24 ms
64 bytes from 10.101.10.20: icmp_seq=9 ttl=127 time=0.354 ms
64 bytes from 10.101.10.20: icmp_seq=10 ttl=127 time=79.5 ms
64 bytes from 10.101.10.20: icmp_seq=11 ttl=127 time=0.416 ms
64 bytes from 10.101.10.20: icmp_seq=12 ttl=127 time=0.427 ms
64 bytes from 10.101.10.20: icmp_seq=13 ttl=127 time=1.90 ms
^C
--- 10.101.10.20 ping statistics ---
13 packets transmitted, 13 received, 0% packet loss, time 12011ms
rtt min/avg/max/mdev = 0.354/15.118/87.950/29.409 ms

Setting the system time with net-misc/ntp-4.2.6_p2 fails with:
root@cheetah:/home/rose(33)# ntpdate -v -d -d -b -u 10.101.10.20
23 Jul 12:54:11 ntpdate[813]: ntpdate 4.2.6p2@1.2194-o Mon Jul 19 02:43:33 UTC 2010 (1)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
10.101.10.20: Server dropped: no data
server 10.101.10.20, port 123
stratum 5, precision -17, leap 00, trust 000
refid [10.101.10.20], delay 0.00000, dispersion 64.00000
transmitted 4, in filter 4
reference time: cff3f35a.029c6b63 Fri, Jul 23 2010 12:54:18.010
originate timestamp: cff3f35a.029c6b63 Fri, Jul 23 2010 12:54:18.010
transmit timestamp: cff3f35a.02f5a519 Fri, Jul 23 2010 12:54:18.011
filter delay: 0.00000 0.00000 0.00000 0.00000
         0.00000 0.00000 0.00000 0.00000
filter offset: 0.000000 0.000000 0.000000 0.000000
         0.000000 0.000000 0.000000 0.000000
delay 0.00000, dispersion 64.00000
offset 0.000000

23 Jul 12:54:19 ntpdate[7112]: no server suitable for synchronization found

If I downgrade to net-misc/ntp-4.2.6_p1-r1 I can set the system time:

root@cheetah:/home/rose(35)# emerge -v1 =net-misc/ntp-4.2.6_p1-r1
...
>>> No outdated packages were found on your system.

 * GNU info directory index is up-to-date.

 * IMPORTANT: 13 config files in '/etc' need updating.
 * See the CONFIGURATION FILES section of the emerge
 * man page to learn how to update config files.
root@cheetah:/home/rose(36)# ntpdate -v -d -d -b -u 10.101.10.20
23 Jul 13:06:26 ntpdate[17815]: ntpdate 4.2.6p1@1.2158-o Fri Jul 23 10:59:23 UTC 2010 (1)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
server 10.101.10.20, port 123
stratum 5, precision -17, leap 00, trust 000
refid [10.101.10.20], delay 0.02599, dispersion 0.00063
transmitted 4, in filter 4
reference time: cff3f632.3c2ab5bc Fri, Jul 23 2010 13:06:26.235
originate timestamp: cff3f632.3c2ab5bc Fri, Jul 23 2010 13:06:26.235
transmit timestamp: cff3f632.40929678 Fri, Jul 23 2010 13:06:26.252
filter delay: 0.02840 0.03220 0.02599 0.02600
         0.00000 0.00000 0.00000 0.00000
filter offset: -0.01843 -0.02038 -0.01740 -0.01740
         0.000000 0.000000 0.000000 0.000000
delay 0.02599, dispersion 0.00063
offset -0.017409

23 Jul 13:06:26 ntpdate[17815]: step time server 10.101.10.20 offset -0.017409 sec

If I now upgrade again ntp, setting system time fails again:
root@cheetah:/home/rose(38)# emerge -vuDN world
...
root@cheetah:/home/rose(38)# dispatch-conf
...
root@cheetah:/home/rose(52)# ntpdate -v -d -d -b -u 10.101.10.20
23 Jul 13:33:03 ntpdate[6092]: ntpdate 4.2.6p2@1.2194-o Fri Jul 23 11:27:06 UTC 2010 (1)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
transmit to 10.101.10.20
receive(10.101.10.20)
transmit(10.101.10.20)
10.101.10.20: Server dropped: no data
server 10.101.10.20, port 123
stratum 5, precision -17, leap 00, trust 000
refid [10.101.10.20], delay 0.00000, dispersion 64.00000
transmitted 4, in filter 4
reference time: cff3fc75.be9b403b Fri, Jul 23 2010 13:33:09.744
originate timestamp: cff3fc75.be9b403b Fri, Jul 23 2010 13:33:09.744
transmit timestamp: cff3fc75.c877304d Fri, Jul 23 2010 13:33:09.783
filter delay: 0.00000 0.00000 0.00000 0.00000
         0.00000 0.00000 0.00000 0.00000
filter offset: 0.000000 0.000000 0.000000 0.000000
         0.000000 0.000000 0.000000 0.000000
delay 0.00000, dispersion 64.00000
offset 0.000000

23 Jul 13:33:11 ntpdate[6092]: no server suitable for synchronization found

PS. Setting of system time with net-misc/ntp-4.2.6_p2 fails on three PCs.
With an other PC outside our institute (not restricted by a firewall) I have no problems to set the system time with net-misc/ntp-4.2.6_p2 and using 0.gentoo.pool.ntp.org as timeserver.

Reproducible: Always