Clock unsyncronized with ntp

[faamin011]

I have configured Ntp sever on 3750x like as below

Ntp server 10.10.10.33

But switch clock is not getting sync with Ntp server, is there any thing missing here

[benjammin]

what is config on NTP server? Is authentication enabled? Can you send output of 'sh ntp assoc detail'?

[Mandlenkosi Nkiwane]

Are you able to ping the NTP server from your switch. I would start from there to check connectivity first, before looking at more complex issues...

[cadet alain]

Hi,

configure the clock manually as close as possible to current time  because otherwise it would take ages to synchronize.

Regards.

Alain

Don't forget to rate helpful posts.

[faamin011]

I am able to ping ntp server which is Microsoft domain controller, no authentication set over there. I have set the clock manually but last time upon rebooting switch it came back to default, which is not fair.

Will share sh Ntp asso detail in next few hours as currently me not connected with switch.

[Richard Burts]

Can you tell us some more about the NTP server? Most Windows Domain Controllers use the Windows Time Service which is similar but not the same as NTP. Are you sure that the Windows Domain Controller is really running NTP and not the Windows Time Service?

HTH

Rick

[Joseph W. Doherty]

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

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In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

If I remember correctly, Rick is quite right about older NT servers.  I recall (?) you could install an optional service to provide NTP.

I'm not 100% certain, but I think I've may have seen (somewhere) that later NT systems upgraded their time service.  If they did though, they might only support SNTP or (Windows being Windows) might not 100% compatible with NTP standards.

You might find some additional information searching these forums.

[faamin011]

NTP Server is 10.10.10.56

Switch1#sh ntp associations detail
10.10.10.56 configured, insane, invalid, stratum 4
ref ID 10.10.10.68   , time D46099D7.62B79603 (14:10:31.385 PST Wed Nov 28 2012)
our mode client, peer mode server, our poll intvl 64, peer poll intvl 64
root delay 31.25 msec, root disp 10409.88, reach 377, sync dist 10493.52
delay 0.99 msec, offset -18013902.5407 msec, dispersion 20.65
precision 2**6, version 4
org time D4609CB7.5E1BF020 (14:22:47.367 PST Wed Nov 28 2012)
rec time D460E315.4BE2C88D (19:23:01.296 PST Wed Nov 28 2012)
xmt time D460E315.4ACE15E1 (19:23:01.292 PST Wed Nov 28 2012)
filtdelay =     4.22    2.00    3.61    2.62    1.16    0.99    1.92    1.12
filtoffset = -180139 -180139 -180139 -180139 -180139 -180139 -180138 -180138
filterror =    15.63   16.59   17.58   18.54   19.51   20.50   21.45   22.44
minpoll = 6, maxpoll = 10

Switch1#sh ntp sta
Switch1#sh ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 119.2092 Hz, actual freq is 119.2092 Hz, precision is 2**17
reference time is 00000000.00000000 (00:00:00.000 PST Mon Jan 1 1900)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 1310.92 msec, peer dispersion is 0.00 msec
loopfilter state is 'FSET' (Drift set from file), drift is 0.000000000 s/s
system poll interval is 64, never updated.

[Joseph W. Doherty]

Disclaimer

The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

Liability Disclaimer

In  no event shall Author be liable for any damages whatsoever (including,  without limitation, damages for loss of use, data or profit) arising out  of the use or inability to use the posting's information even if Author  has been advised of the possibility of such damage.

Posting

Hmm, the "insane, invalid" doesn't bode well.

[Leo Laohoo]

I am able to ping ntp server which is Microsoft domain controller,

I agree with Rick.  Using ANY MS OS as an NTP server does not work well.

MS OS works well when they (MS OS) "asks" to synchronize time with Cisco appliance.  In my experience, MS OS does not "play well" when you tell it to talk to other appliance (like Cisco) OTHER THAN MS OS.

[Mandlenkosi Nkiwane]

This document might be able to assist you:

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080a23d02.shtml

And also this old post:

https://supportforums.cisco.com/thread/171409

[Mandlenkosi Nkiwane]

From I have read so far, you are better off getting something else to work as an NTP server than using the Windows Server for it.

See also: http://serverfault.com/questions/402251/cisco-asa5505-wont-sync-with-ntp

Hope this helps.

[Leo Laohoo]

From I have read so far, you are better off getting something else to work as an NTP server than using the Windows Server for it.

Yes.  This is how we've set ours up.