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CUCM NTP will not synchronise

pedrop
Level 1
Level 1

In a lab, I have a CSR that is configured as NTP master. The CSR is showing as synchronised:

 

R1#show ntp status

Clock is synchronized, stratum 3, reference is 185.53.93.157 

nominal freq is 250.0000 Hz, actual freq is 249.8750 Hz, precision is 2**10

ntp uptime is 565600 (1/100 of seconds), resolution is 4016

reference time is E0432D98.9D82A706 (10:36:08.615 GMT Mon Mar 25 2019)

clock offset is 262.2631 msec, root delay is 25.04 msec

root dispersion is 1448.53 msec, peer dispersion is 940.82 msec

loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000499999 s/s

system poll interval is 256, last update was 59 sec ago.

 

The CUCM never shows as synchronised despite the CSR showing as accessible:

 

admin:utils ntp status

ntpd (pid 12762) is running...

 

     remote           refid      st t when poll reach   delay   offset  jitter

==============================================================================

10.10.0.254     185.53.93.157    3 u   29   64    1    4.537    4.708   2.603

 

 

unsynchronised

   polling server every 64 s

 

Current time in UTC is : Mon Mar 25 10:37:52 UTC 2019

Current time in Europe/London is : Mon Mar 25 10:37:52 GMT 2019

 

Why do I have difficulty getting CUCM to show synchronised?

 

I am assuming that I will be unable to install IMP server with the NTP in this state?

 

Many thanks

1 Accepted Solution

Accepted Solutions

tgaur
Cisco Employee
Cisco Employee

hi,

 

try to restart the NTP, note this time and collect the NTP logs from the call manager RTMT. after this check on the respective time what you find on the logs.

 

make sure we are full filling the following requirement :

 

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/118718-technote-cucm-00.html

 

is this never get in sync or it drop the sync on regular interval.

 

regards.

 

View solution in original post

1 Reply 1

tgaur
Cisco Employee
Cisco Employee

hi,

 

try to restart the NTP, note this time and collect the NTP logs from the call manager RTMT. after this check on the respective time what you find on the logs.

 

make sure we are full filling the following requirement :

 

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/118718-technote-cucm-00.html

 

is this never get in sync or it drop the sync on regular interval.

 

regards.