[ntp:questions] NTP - orphan mode with SAME stratum ("tos orphan 6") FAIL to sync.

sheikdawoodrajali at gmail.com sheikdawoodrajali at gmail.com
Fri Apr 3 16:02:55 UTC 2009


Thanks for the info.

[Dave] Your broadcast clients have very large offsets beyond the
panic threshold (1000 s).
>> I verified my configuration file and it has "tinker panic 0" command
present to accept ANY offset value by ntpd service. Let me know if
you
think otherwise

[Dave] Easiest way to start is to disable one of the rails and let the
munchkins synchronize, then bring up the second rail.
>> I'll do it and let you know.

And also I've seen a "low" offset numbers for both primary/secondary
ONLY
when I start the ntpd service ONE-BY-ONE.

For example:
having 7 nodes in the environment, if I stop ALL of them and
start 2 nodes only, the offset values are low and it sync fine.

By doing the same way, starting services one-by-one works fine too..

It fails only IF ALL of the services started @ once...

may be the offset values are higher bcoz of time overlap.

QSTN
1) I doubt there could be problem/failures in "Leader" selection
algorithm
implementation in "ORPHAN" mode. Thoughts??

2) Running 7 nodes in "ORPHAN mode with same stratum", how to
verify who is the leader?


Pls share your thoughts.


~ DWD

On Apr 3, 8:14 am, mi... at udel.edu (David Mills) wrote:
> sheikdawoodraj... at gmail.com,
>
> The x's have nothing to do with broadcast or withorphanor with the
> number of hosts, which is unlimited. It has to do with the intersection
> algorithm. Your broadcast clients have very large offsets beyond the
> panic threshold (1000 s). In addition, your prmary and secondary rails
> should be within a few milliseconds of each other or the correctness
> intervals might not overlap. See the docuementation for the tos mindist
> command.
>
> Easiest way to start is to disable one of the rails and let the
> munchkins synchronize, then bring up the second rail.
>
> Dave
>
>
>
> sheikdawoodraj... at gmail.com wrote:
> >I am testing "Time Island" in NTP on Windows platform.
> >I built the binaries using source downloaded from meinberg site.
>
> >Binaries built successfully and I'm testing it now.
>
> >NTP on ALL the nodes (7 nodes) with SAME stratum "orphanstratum 6"
> >identically configured
> >both as broadcast client and broadcast server ("Time Island") works
> >fine.
>
> >Problem:
> >--------------
> >When all the 7 nodes have the same config, using "orphanstratum 6"
> >and using the primary/secondary network broadcast FAILED to time-sync.
>
> >Time sync was successful ONLY if i do testing <=5 nodes.
>
> >And the "Selection algorithm tuning parameters" has the belowvalues:
> >#define     NTP_MINCLOCK    3       /* min survivors */
> >#define     NTP_MAXCLOCK    10      /* max candidates */
> >#define     NTP_MAXASSOC    50      /* max associations */
>
> >Does it mean we cant have mode than 5 nodes (every node has 2
> >broadcast interfaces, one for primary and other for secondary)
> >configured in the SAME stratum level ?
>
> >If I have more 7 nodes during the testing, the "ntpq -q" results
> >"X" condition to ALL the nodes during the query.
>
> >What's the MAX number of nodes that can be used forORPHANmode
> >testing?
>
> >Any suggestions on this regard are welcome!!
>
> >BILLBOARD results:
> >------------------------------
>
> >ntpq>
> >peers
> >     remote           refid      st t when poll reach   delay
> >offset  jitter
> >==========================================================================­====
> > 39.95.255.255   .BCST.          16 u    -   64    0    0.000
> >0.000   0.001
> > 39.111.255.255  .BCST.          16 u    -   64    0    0.000
> >0.000   0.001
> >x39.92.128.6     127.0.0.1        6 u   59   64  376    0.236
> >-130361   1.410
> >x39.108.128.6    127.0.0.1        6 u   53   64  376    0.174
> >-130361   1.396
> >x39.98.208.6     127.0.0.1        6 u   61   64  376    0.210
> >-548318   2.975
> >x39.82.208.6     127.0.0.1        6 u   60   64  376    0.218
> >-548318   2.541
> >x39.81.224.16    127.0.0.1        6 u   42   64  376    0.393
> >-455581   1.901
> >x39.97.224.16    127.0.0.1        6 u   48   64  377    0.390
> >-455581   1.621
> >x39.81.224.15    127.0.0.1        6 u   45   64  376    0.216
> >-455603   0.695
> >x39.97.224.15    127.0.0.1        6 u   36   64  376    0.502
> >-455604   0.698
> >x39.81.224.6     127.0.0.1        6 u   43   64  377    0.176
> >1059871   0.968
> >x39.97.224.6     127.0.0.1        6 u   45   64  376    0.245
> >1059868   0.815
> >x39.97.64.6      127.0.0.1        6 u   29   64  376    0.236
> >42.836   3.811
> >x39.81.64.6      127.0.0.1        6 u   24   64  377    0.194
> >43.809   4.880
> >ntpq>
>
> >ntpq>
> >assoc
>
> >ind assID status  conf reach auth condition  last_event
> >cnt
> >===========================================================
> >  1 37893  c000   yes   yes   bad
> >reject
> >  2 37894  c000   yes   yes   bad
> >reject
> >  3 37895  7114    no   yes   ok  falsetick   reachable
> >1
> >  4 37896  7114    no   yes   ok  falsetick   reachable
> >1
> >  5 37897  7114    no   yes   ok  falsetick   reachable
> >1
> >  6 37898  7114    no   yes   ok  falsetick   reachable
> >1
> >  7 37899  7114    no   yes   ok  falsetick   reachable
> >1
> >  8 37900  7114    no   yes   ok  falsetick   reachable
> >1
> >  9 37901  7114    no   yes   ok  falsetick   reachable
> >1
> > 10 37902  7114    no   yes   ok  falsetick   reachable
> >1
> > 11 37903  7114    no   yes   ok  falsetick   reachable
> >1
> > 12 37904  7114    no   yes   ok  falsetick   reachable
> >1
> > 13 37905  7114    no   yes   ok  falsetick   reachable
> >1
> > 14 37906  7114    no   yes   ok  falsetick   reachable
> >1
> >ntpq>
>
> >ntpq>
> >passoc
>
> >ind assID status  conf reach auth condition  last_event
> >cnt
> >===========================================================
> >  1 37893  c000   yes   yes   bad
> >reject
> >  2 37894  c000   yes   yes   bad
> >reject
> >  3 37895  7114    no   yes   ok  falsetick   reachable
> >1
> >  4 37896  7114    no   yes   ok  falsetick   reachable
> >1
> >  5 37897  7114    no   yes   ok  falsetick   reachable
> >1
> >  6 37898  7114    no   yes   ok  falsetick   reachable
> >1
> >  7 37899  7114    no   yes   ok  falsetick   reachable
> >1
> >  8 37900  7114    no   yes   ok  falsetick   reachable
> >1
> >  9 37901  7114    no   yes   ok  falsetick   reachable
> >1
> > 10 37902  7114    no   yes   ok  falsetick   reachable
> >1
> > 11 37903  7114    no   yes   ok  falsetick   reachable
> >1
> > 12 37904  7114    no   yes   ok  falsetick   reachable
> >1
> > 13 37905  7114    no   yes   ok  falsetick   reachable
> >1
> > 14 37906  7114    no   yes   ok  falsetick   reachable
> >1
> >ntpq>
>
> >ntpq>
> >readvar
> >assID=0 status=0011 leap_none, sync_unspec, 1 event,
> >event_restart,
> >version="ntpd 4.2.... at 1.1541-o Mar 15 23:23:09.92 (UTC-07:00) 2009
> >(12)",
> >processor="unknown", system="WINDOWS/NT", leap=00,
> >stratum=6,
> >precision=-20, rootdelay=0.000, rootdispersion=0.030,
> >peer=0,
> >refid=127.0.0.1, reftime=00000000.00000000  --- --- -- ----
> >--:--:--,
> >poll=6, clock=cd7b6f4c.4b49fb4e  Mon, Mar 30 2009 17:18:20.294,
> >state=0,
> >offset=0.000, frequency=0.000, jitter=0.001,
> >noise=0.001,
> >stability=0.000,
> >tai=0
> >ntpq>
>
> >ntpdc>
> >listpeers
> >broadcast
> >39.95.255.255
> >control
> >39.81.64.6
> >broadcast
> >39.111.255.255
> >control
> >39.97.64.6
> >control
> >39.92.128.6
> >control
> >39.81.224.6
> >control
> >39.108.128.6
> >control
> >39.81.224.15
> >control
> >39.82.208.6
> >control
> >39.81.224.16
> >control
> >39.97.224.6
> >control
> >39.97.224.15
> >control
> >39.98.208.6
> >control
> >39.97.224.16
> >ntpdc>
>
> >ntpdc>
> >sysstats
> >time since restart:
> >2958
> >time since reset:
> >2958
> >packets received:
> >869
> >packets processed:
> >630
> >current version:
> >741
> >previous version:
> >0
> >bad version:
> >0
> >access denied:
> >92
> >bad length or format:
> >0
> >bad authentication:
> >0
> >rate exceeded:
> >0
> >ntpdc>
>
> >ntpdc>
> >sysinfo
> >system peer:
> >0.0.0.0
> >system peer mode:
> >unspec
> >leap indicator:
> >00
> >stratum:
> >6
> >precision:
> >-20
> >root distance:        0.00000
> >s
> >root dispersion:      0.00002
> >s
> >reference ID:
> >[127.0.0.1]
> >reference time:       00000000.00000000  --- --- -- ----
> >--:--:--
> >system flags:         bclient auth monitor ntp kernel
> >stats
> >jitter:               0.000000
> >s
> >stability:            0.000
> >ppm
> >broadcastdelay:       0.003998
> >s
> >authdelay:            0.000006
> >s
> >ntpdc>
>
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