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Community Member

NTP Syncronization Issues

Hello

I'm trying to connect Switch 3560 to NTP Server based on Linux, the NTP is working fine but the switch is sync with the Server:

      address         ref clock     st  when  poll reach  delay  offset    disp

*~10.0.0.70        208.53.158.34     3    42    64  377     1.7   -2.49     0.1

* master (synced), # master (unsynced), + selected, - candidate, ~ configured

Clock is synchronized, stratum 4, reference is 10.0.0.70

nominal freq is 119.2092 Hz, actual freq is 119.2093 Hz, precision is 2**18

reference time is D39342D7.C585B631 (21:04:39.771 AST Sun Jun 24 2012)

clock offset is -2.7990 msec, root delay is 83.40 msec

root dispersion is 761.64 msec, peer dispersion is 0.32 msec

Jun 25 19:52:55.776:  rtdel 14B6 (80.902), rtdsp BF7A (747.955), refid D0359E22 (208.53.158.34)

Jun 25 19:52:55.776:  ref D392FDA2.9E3C12AB (16:09:22.618 AST Sun Jun 24 2012)

Jun 25 19:52:55.776:  org D3934017.C6D7D7EE (20:52:55.776 AST Sun Jun 24 2012)

Jun 25 19:52:55.776:  rec D3934017.C6153A63 (20:52:55.773 AST Sun Jun 24 2012)

Jun 25 19:52:55.776:  xmt D3934017.C618DF0B (20:52:55.773 AST Sun Jun 24 2012)

Jun 25 19:52:55.776:  inp D3934017.C76F2EA1 (20:52:55.779 AST Sun Jun 24 2012)

But server has on time and the Switch another. I test this NTP with CUCM and is working fine, the issue is with ther server

Any help

Thanks

Everyone's tags (2)
9 REPLIES
Gold

NTP Syncronization Issues

Hi,

Do you have correct time zone on ur devices?

have in mind that NTP is a slow protocol, you have to give it some time to completely sync.

Hope it Helps,

Soroush.

Hope it Helps!

Soroush.
Purple

Re: NTP Syncronization Issues

Does the time correlate correctly and its just off by some number of hours . If so you need to specify if you have it as UTC time or a specific local timezone .  

Hall of Fame Super Blue

NTP Syncronization Issues

*~10.0.0.70        208.53.158.34     3    42    64  377     1.7   -2.49     0.1

See the "*" and the "~"?  It means that your switch's NTP settings are correct and it's able to synchronize with an NTP source.

Community Member

Re: NTP Syncronization Issues

Thanks for your answers

But if they're synchronized why is getting the wrong time, also I put the same time zone of the sever, and in the serve I could see the switch associated with the server.

But in the CUCM sever works fine

Any suggestion

Thanks

Sent from Cisco Technical Support iPad App

Hall of Fame Super Blue

NTP Syncronization Issues

But if they're synchronized why is getting the wrong time,

Wrong time or wrong hours (correct minutes)?

Like what the others before me have said, can you please post the output to the command "sh run | i clock"?

Community Member

NTP Syncronization Issues

Switch#sh run | i clock

clock timezone AST -23

ntp clock-period 36028972

Hall of Fame Super Blue

NTP Syncronization Issues

clock timezone AST -23

ntp clock-period 36028972

So the minutes are fine but the hours are not? 

Community Member

NTP Syncronization Issues

Thanks for the answer

that's correct

the hours is not correct

Hall of Fame Super Blue

NTP Syncronization Issues

the hours is not correct

Sorry, but I don't know where you are so I am not sure what time difference you have with GMT/UTC time.

I think your statement "clock timezone AST " is the culprit.

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