[ntp:questions] ntpdate[488]: no server suitable for synchronization found...

Kit Plummer christopher_plummer at raytheon.com
Wed Nov 24 16:39:52 UTC 2004


Even more info:

According to the FAQ the `no server suitable for synchronization found`  
message could relate to problems communicating through UDP port 123.  I  
ran a tcpdump and get this:

tcpdump://en0@localhost;options=-n -p -t
IP 147.24.71.89.138 > 147.24.71.255.138: NBT UDP PACKET(138)
IP 147.24.71.89.138 > 147.24.71.255.138: NBT UDP PACKET(138)
IP 147.24.71.112.123 > 147.24.61.18.123: NTPv4 client, strat 0, poll 4,  
prec -6
IP 147.24.61.18.123 > 147.24.71.112.123: NTPv4 server, strat 0, poll 4,  
prec -19
IP 147.24.71.112.123 > 147.24.61.18.123: NTPv4 client, strat 0, poll 4,  
prec -6
IP 147.24.61.18.123 > 147.24.71.112.123: NTPv4 server, strat 0, poll 4,  
prec -19
IP 147.24.71.112.123 > 147.24.61.18.123: NTPv4 client, strat 0, poll 4,  
prec -6
IP 147.24.61.18.123 > 147.24.71.112.123: NTPv4 server, strat 0, poll 4,  
prec -19
IP 147.24.71.112.123 > 147.24.61.18.123: NTPv4 client, strat 0, poll 4,  
prec -6
IP 147.24.61.18.123 > 147.24.71.112.123: NTPv4 server, strat 0, poll 4,  
prec -19
IP 147.24.71.112.123 > 147.24.61.18.123: NTPv4 client, strat 0, poll 4,  
prec -6
IP 147.24.61.18.123 > 147.24.71.112.123: NTPv4 server, strat 0, poll 4,  
prec -19
IP 147.24.71.112.123 > 147.24.61.18.123: NTPv4 client, strat 0, poll 4,  
prec -6
IP 147.24.61.18.123 > 147.24.71.112.123: NTPv4 server, strat 0, poll 4,  
prec -19
IP 147.24.71.112 > 239.255.255.253: igmp v2 report 239.255.255.253
IP 147.24.71.112.123 > 147.24.61.18.123: NTPv4 client, strat 0, poll 4,  
prec -6
IP 147.24.61.18.123 > 147.24.71.112.123: NTPv4 server, strat 0, poll 4,  
prec -19
IP 147.24.71.112.123 > 147.24.61.18.123: NTPv4 client, strat 0, poll 4,  
prec -6
IP 147.24.61.18.123 > 147.24.71.112.123: NTPv4 server, strat 0, poll 4,  
prec -19
----------------[End of response]----------------

Looking at the communication back and forth...I don't think it is a  
problem with the UDP port.  Anyone else agree?

Kit

On Nov 24, 2004, at 9:14 AM, Kit Plummer wrote:

> More info:
>
> bash-2.05$ ntpq -c as
> ind assID status  conf reach auth condition  last_event cnt
> ===========================================================
>   1 32412  8000   yes   yes  none    reject
>
>
> On Nov 24, 2004, at 8:46 AM, Kit Plummer wrote:
>
>> I've hacked one of the VME drivers to work with my Brandywine  
>> Syncclock32 VME board.  I believe I getting the time correctly  
>> through the reference driver.  However, things aren't working right.
>>
>> $ ntpdate -q worf
>> Looking for host worf and service ntp
>> host found : worf.tuc.us.ray.com
>> server 147.24.61.18, stratum 16, offset -0.000007, delay 0.02580
>> 24 Nov 08:46:30 ntpdate[488]: no server suitable for synchronization  
>> found
>>
>> $ ntpq -p localhost
>>      remote           refid      st t when poll reach   delay    
>> offset  jitter
>> ====================================================================== 
>> ========
>>  GPS_BANC(0)     .BTFP.           0 l    -   64    0    0.000     
>> 0.000 4000.00
>>
>> bash-2.05$ ntpq
>> ntpq> cl
>> status=0606 clk_badtime, last_clk_badtime,
>> type=16, timecode="329 15:12:15.000100 0", poll=4, noreply=0,
>> badformat=0, baddata=4, fudgetime1=0.000, stratum=0, refid=BTFP,
>> flags=0
>> ntpq>
>>
>> I did notice th baddate=4 - but, not sure what to make of it.
>>
>> Help!
>>
>> TIA,
>> Kit
>> ---------------------------------------------------------------------- 
>> --
>> Kit Plummer
>> Operations Research and System Performance Dept.
>> Raytheon Missile Systems
>>
>> _______________________________________________
>> questions mailing list
>> questions at lists.ntp.isc.org
>> https://lists.ntp.isc.org/mailman/listinfo/questions
>>
>
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