NTP Issue on cisco 3560 switch

[RAJA RAHMAN]

Hi all 

Here is my ntp configuration 

****************************

clock timezone GMT 4
clock summer-time UAE recurring

ntp server 192.168.10.254 version 2 prefer
end

************************************

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 (04:00:00.000 GMT Mon Jan 1 1900)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 0.00 msec, peer dispersion is 0.00 msec

-SW1#sh ntp associations

      address         ref clock     st  when  poll reach  delay  offset    disp
 ~192.168.10.254   0.0.0.0          16     -    64    0     0.0    0.00  16000.
 * master (synced), # master (unsynced), + selected, - candidate, ~ configured
-SW1#

Please help me what i have did wrong 

regards

raja

[Leo Laohoo]

Let's go with the basic.  

First, 192.168.10.254, is this a synchronized NTP/SNTP source?  

Next, NTP version 2, would it make a difference?

[RAJA RAHMAN]

HI 

My switch ip is 192.168.10.254  i need to make that as my ntp server  for all my network devices 

Please can you give the configuration 

[paul driver]

Hello

Is that device setup as a ntp master?

example:

NTP Master:

conf t
ntp master 12
ntp master
ntp max-associations xx
clock update-calendar
clock read-calendar

ntp authenticate
ntp authentication-key 931 md5 ntppassword
ntp trusted-key 931

NTP clients
--------------

conf t
ntp peer
ntp server 192.168.10.254 prefer

ntp authenticate
ntp authentication-key 931 md5 ntppassword
ntp trusted-key 931

res

Paul

[Leo Laohoo]

You're still not answering the question:  Is the appliance, with IP Address 192.168.0.254, synchronized with a valid SNTP/NTP address or not. 

If the answer is no, then NTP to the downstream device will be "quasi" or not-really-trusted.  

[RAJA RAHMAN]

Hi leo 

I need to make the switch 192.168.10.254  as ntp server 

[Leo Laohoo]

You are still not answering the question.  

Is the appliance, with IP Address 192.168.10.254, synchronized with a valid SNTP/NTP address or not. 

Even if you enable NTP Master (which I personally don't recommend) and your appliance is NOT synchronized to a valid NTP source, then the appliance 192.168.10.254 can potentially broadcast the WRONG time to all the appliance.  Since you've forced all downstream appliances to synchronize with a source that has the wrong NTP data (using the command "ntp master") all your network equipment will be sporting the wrong time.