[ntp:questions] systems won't synchronize no matter what

Florin Andrei florin at andrei.myip.org
Fri Oct 22 18:24:16 UTC 2010


I've 3 machines that would not synchronize to NTP servers no matter 
what. They always end up stratum 10. They are regular Dell servers, 
kernel 2.6.18-128.7.1.0.1.el5, ntp 4.2.2p1-7.el5

I tried to sync up to local NTP servers, I tried the US pool, I cleaned 
up the drift file, nothing works, even though the initial offset is 
really small (ntpdate seems to work).


Config file:

server 10.10.16.65 iburst
server 10.10.16.64 iburst
server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 10
driftfile /etc/ntp/drift
restrict 127.0.0.0 mask 255.0.0.0
restrict 192.168.3.0 mask 255.255.255.0 nomodify notrap
restrict default ignore


Command line:

ntpd -d -s /var/lib/ntp/stats -x -u ntp:ntp -p /var/run/ntpd.pid


This is the state they end up in:

# ntpq -p
      remote           refid      st t when poll reach   delay   offset 
  jitter
==============================================================================
  ut12            .INIT.          16 u    -   64    0    0.000    0.000 
   0.000
  ut11            .INIT.          16 u    -   64    0    0.000    0.000 
   0.000
*LOCAL(0)        .LOCL.          10 l    2   64   77    0.000    0.000 
  0.001


This is the status of one of the servers they are querying:

      remote           refid      st t when poll reach   delay   offset 
  jitter
==============================================================================
+ns1.tic.com     128.9.176.30     2 u   74 1024  377   54.117   -3.711 
42.480
+you.dontlike.us 128.4.40.12      3 u   30 1024  377   76.102   -1.723 
  0.183
*clock.team-cymr 172.16.65.22     2 u  100 1024  377   67.046    3.628 
  0.130
  LOCAL(0)        .LOCL.          10 l   31   64  377    0.000    0.000 
   0.001


This is syslog:

Oct 22 11:06:41 db23 ntpdate[30868]: step time server 10.10.16.64 offset 
0.056358 sec
Oct 22 11:06:41 db23 ntpd[30870]: ntpd 4.2.2p1 at 1.1570-o Tue Aug 21 
17:51:27 UTC 2007 (1)
Oct 22 11:06:41 db23 ntpd[30870]: precision = 1.000 usec
Oct 22 11:06:41 db23 ntpd[30870]: Listening on interface wildcard, 
0.0.0.0#123 Disabled
Oct 22 11:06:41 db23 ntpd[30870]: Listening on interface wildcard, 
::#123 Disabled
Oct 22 11:06:41 db23 ntpd[30870]: Listening on interface lo, ::1#123 Enabled
Oct 22 11:06:41 db23 ntpd[30870]: Listening on interface bond1, 
fe80::21e:c9ff:feb0:d128#123 Enabled
Oct 22 11:06:41 db23 ntpd[30870]: Listening on interface bond0, 
fe80::215:17ff:fe7d:2a90#123 Enabled
Oct 22 11:06:41 db23 ntpd[30870]: Listening on interface lo, 
127.0.0.1#123 Enabled
Oct 22 11:06:41 db23 ntpd[30870]: Listening on interface bond0, 
10.10.16.101#123 Enabled
Oct 22 11:06:41 db23 ntpd[30870]: Listening on interface bond1, 
10.10.20.101#123 Enabled
Oct 22 11:06:41 db23 ntpd[30870]: kernel time sync status 0040
Oct 22 11:06:41 db23 ntpd[30870]: frequency initialized 0.000 PPM from 
/etc/ntp/drift
Oct 22 11:09:59 db23 ntpd[30870]: synchronized to LOCAL(0), stratum 10
Oct 22 11:09:59 db23 ntpd[30870]: kernel time sync enabled 0001


These are debug messages:

Starting ntpd: ntpd 4.2.2p1 at 1.1570-o Tue Aug 21 17:51:27 UTC 2007 (1)
addto_syslog: precision = 1.000 usec
create_sockets(123)
addto_syslog: ntp_io: estimated max descriptors: 1024, initial socket 
boundary: 16
bind() fd 16, family 2, port 123, addr 0.0.0.0, flags=9
Added addr 0.0.0.0 to list of addresses
addto_syslog: Listening on interface wildcard, 0.0.0.0#123 Disabled
bind() fd 17, family 10, port 123, addr ::, flags=1
Added addr :: to list of addresses
addto_syslog: Listening on interface wildcard, ::#123 Disabled
bind() fd 18, family 10, port 123, addr ::1, flags=1
Added addr ::1 to list of addresses
addto_syslog: Listening on interface lo, ::1#123 Enabled
bind() fd 19, family 10, port 123, addr fe80::21e:c9ff:feb0:d128, flags=1
Added addr fe80::21e:c9ff:feb0:d128 to list of addresses
addto_syslog: Listening on interface bond1, fe80::21e:c9ff:feb0:d128#123 
Enabled
bind() fd 20, family 10, port 123, addr fe80::215:17ff:fe7d:2a90, flags=1
Added addr fe80::215:17ff:fe7d:2a90 to list of addresses
addto_syslog: Listening on interface bond0, fe80::215:17ff:fe7d:2a90#123 
Enabled
bind() fd 21, family 2, port 123, addr 127.0.0.1, flags=5
Added addr 127.0.0.1 to list of addresses
addto_syslog: Listening on interface lo, 127.0.0.1#123 Enabled
bind() fd 22, family 2, port 123, addr 10.10.16.101, flags=25
Added addr 10.10.16.101 to list of addresses
addto_syslog: Listening on interface bond0, 10.10.16.101#123 Enabled
bind() fd 23, family 2, port 123, addr 10.10.20.101, flags=25
Added addr 10.10.20.101 to list of addresses
addto_syslog: Listening on interface bond1, 10.10.20.101#123 Enabled
init_io: maxactivefd 23
local_clock: time 0 base 0.000000 offset 0.000000 freq 0.000 state 0
key_expire: at 0
peer_clear: at 0 next 1 assoc ID 5730 refid INIT
newpeer: 10.10.16.101->10.10.16.65 mode 3 vers 4 poll 6 10 flags 0x201 
0x1 ttl 0 key 00000000
key_expire: at 0
peer_clear: at 0 next 2 assoc ID 5731 refid INIT
newpeer: 10.10.16.101->10.10.16.64 mode 3 vers 4 poll 6 10 flags 0x201 
0x1 ttl 0 key 00000000
key_expire: at 0
peer_clear: at 0 next 3 assoc ID 5732 refid INIT
newpeer: 127.0.0.1->127.127.1.0 mode 3 vers 4 poll 6 10 flags 0x1021 0x1 
ttl 0 key 00000000
addto_syslog: frequency initialized 0.000 PPM from /etc/ntp/drift
local_clock: time 0 base 0.000000 offset 0.000000 freq 0.000 state 1
report_event: system event 'event_restart' (0x01) status 'sync_alarm, 
sync_unspec, 1 event, event_unspec' (0xc010)
transmit: at 1 10.10.16.101->10.10.16.65 mode 3
auth_agekeys: at 1 keys 1 expired 0
timer: refresh ts 0
transmit: at 2 10.10.16.101->10.10.16.64 mode 3
refclock_transmit: at 3 127.127.1.0
refclock_receive: at 3 127.127.1.0
peer LOCAL(0) event 'event_reach' (0x84) status 'unreach, conf, 1 event, 
event_reach' (0x8014)
refclock_sample: n 1 offset 0.000000 disp 0.010000 jitter 0.000001
clock_filter: n 1 off 0.000000 del 0.000000 dsp 7.937500 jit 0.000001, age 0
transmit: at 3 10.10.16.101->10.10.16.65 mode 3
transmit: at 4 10.10.16.101->10.10.16.64 mode 3
transmit: at 5 10.10.16.101->10.10.16.65 mode 3
transmit: at 6 10.10.16.101->10.10.16.64 mode 3
transmit: at 7 10.10.16.101->10.10.16.65 mode 3
transmit: at 8 10.10.16.101->10.10.16.64 mode 3
transmit: at 9 10.10.16.101->10.10.16.65 mode 3
transmit: at 10 10.10.16.101->10.10.16.64 mode 3
transmit: at 11 10.10.16.101->10.10.16.65 mode 3
transmit: at 12 10.10.16.101->10.10.16.64 mode 3
transmit: at 13 10.10.16.101->10.10.16.65 mode 3
transmit: at 14 10.10.16.101->10.10.16.64 mode 3
transmit: at 15 10.10.16.101->10.10.16.65 mode 3
transmit: at 16 10.10.16.101->10.10.16.64 mode 3
transmit: at 17 10.10.16.101->10.10.16.65 mode 3
transmit: at 18 10.10.16.101->10.10.16.64 mode 3
auth_agekeys: at 60 keys 1 expired 0
transmit: at 65 10.10.16.101->10.10.16.64 mode 3
transmit: at 67 10.10.16.101->10.10.16.65 mode 3
refclock_transmit: at 68 127.127.1.0
refclock_receive: at 68 127.127.1.0
refclock_sample: n 1 offset 0.000000 disp 0.010000 jitter 0.000001
clock_filter: n 2 off 0.000000 del 0.000000 dsp 3.937744 jit 0.000001, age 0
auth_agekeys: at 120 keys 1 expired 0
transmit: at 131 10.10.16.101->10.10.16.64 mode 3
refclock_transmit: at 133 127.127.1.0
refclock_receive: at 133 127.127.1.0
refclock_sample: n 1 offset 0.000000 disp 0.010000 jitter 0.000001
clock_filter: n 3 off 0.000000 del 0.000000 dsp 1.937988 jit 0.000001, age 0
transmit: at 133 10.10.16.101->10.10.16.65 mode 3
auth_agekeys: at 180 keys 1 expired 0
transmit: at 195 10.10.16.101->10.10.16.64 mode 3
transmit: at 197 10.10.16.101->10.10.16.65 mode 3
refclock_transmit: at 198 127.127.1.0
refclock_receive: at 198 127.127.1.0
refclock_sample: n 1 offset 0.000000 disp 0.010000 jitter 0.000001
clock_filter: n 4 off 0.000000 del 0.000000 dsp 0.938171 jit 0.000001, age 0
report_event: system event 'event_peer/strat_chg' (0x04) status 
'sync_alarm, sync_local_proto, 2 events, event_restart' (0xc521)
addto_syslog: synchronized to LOCAL(0), stratum 10
clock_update: at 198 assoc 3
local_clock: assocID 5732 offset 0.000000000 freq 0.000 state 1
local_clock: time 198 base 0.000000 offset 0.000000 freq 0.000 state 4
addto_syslog: kernel time sync enabled 0001
local_clock: mu 198 jitr 0.000001 freq 0.000 stab 0.000000 poll 6 count 6
report_event: system event 'event_sync_chg' (0x03) status 'leap_none, 
sync_local_proto, 3 events, event_peer/strat_chg' (0x534)
crypto_update: update ts 3496759799
report_event: system event 'event_peer/strat_chg' (0x04) status 
'leap_none, sync_local_proto, 4 events, event_sync_chg' (0x543)
auth_agekeys: at 240 keys 1 expired 0
transmit: at 258 10.10.16.101->10.10.16.64 mode 3
refclock_transmit: at 261 127.127.1.0
refclock_receive: at 261 127.127.1.0
refclock_sample: n 1 offset 0.000000 disp 0.010000 jitter 0.000001
clock_filter: n 5 off 0.000000 del 0.000000 dsp 0.438279 jit 0.000001, age 0
clock_update: at 261 assoc 3
local_clock: assocID 5732 offset 0.000000000 freq 0.000 state 4
local_clock: time 261 base 0.000000 offset 0.000000 freq 0.000 state 4
local_clock: mu 63 jitr 0.000001 freq 0.000 stab 0.000000 poll 6 count 12
transmit: at 262 10.10.16.101->10.10.16.65 mode 3
auth_agekeys: at 300 keys 1 expired 0
transmit: at 323 10.10.16.101->10.10.16.64 mode 3
refclock_transmit: at 326 127.127.1.0
refclock_receive: at 326 127.127.1.0
refclock_sample: n 1 offset 0.000000 disp 0.010000 jitter 0.000001
clock_filter: n 6 off 0.000000 del 0.000000 dsp 0.188362 jit 0.000001, age 0
clock_update: at 326 assoc 3
local_clock: assocID 5732 offset 0.000000000 freq 0.000 state 4
local_clock: time 326 base 0.000000 offset 0.000000 freq 0.000 state 4
local_clock: mu 65 jitr 0.000001 freq 0.000 stab 0.000000 poll 6 count 18
transmit: at 327 10.10.16.101->10.10.16.65 mode 3


-- 
Florin Andrei
http://florin.myip.org/



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