cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
11468
Views
5
Helpful
11
Replies
Highlighted
Frequent Contributor

NTP server unreachable

Hi,

I have the following weird issue with NTP. When I check with the command "utils ntp status" I get the information that clock is Synchronized:

admin:utils ntp status
ntpd (pid 6811) is running...

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+193.239.214.227 145.238.203.10   3 u  153  256  377   35.319   -1.920   0.647
*178.239.61.38   193.67.79.202    2 u  202  256  377   61.296   -2.136   0.574


synchronised to NTP server (178.239.61.38) at stratum 3
   time correct to within 122 ms
   polling server every 256 s

But in the CUCM GUI I see "WARNING: NTP server unreachable

In the OS administration I see:

1.gr.pool.ntp.org    The NTP server could not be contacted.
1.europe.pool.ntp.org    The NTP server could not be contacted.

When I use IP addresses instead of names, everything is OK

Any idea?

Bye

11 REPLIES 11
Highlighted
Cisco Employee

Please note NTP does not go unsynchronized straightaway, it takes time hence the output you are getting on OS Admin is valid. BTW, if the IP address is working fine then why are you choosing FQDN. Also, it is not recommended to use free NTP source available on the internet. You should be using a dedicated IOS based NTP source within your internal network itself for the UC applications.

Regards

Deepak

Highlighted

Hello Deepak,

Normally with an installation I use an IOS box to sync to an NTP resource in the Internet, and the CUCM Publisher uses this IOS box as it's NTP resource

Just find it weird that when the NTP (on CUCM) is configured with IP (External or Internal) the GUI and the CLI tell me that all is OK, but when I configure an FQDN, the CLI says all is OK, but the GUI says unreachable.

Just curious why this is, doesn't make sense!

Thanks

Jan

Highlighted

Hi Jan,

I have the same behavior with internal NTP servers. I configured the server with FQDN via CLI - status shows fine on CLI. In GUI it says "The NTP server could not be contacted." Did you find a solution for this?

Thank you,

Andreas

Highlighted

nope, just use IP's

Bye

Highlighted

Hi,

I have same issue, could you please tell me which CUCM version did you use ?

Tnx

Highlighted

I have seen this issue in CUCM 10.5.2. I restarted the NTP service to fix this issue. Run the command 'utils ntp restart' from the cli.

Highlighted
Beginner

I have seen this issue in CUCM 10.5.2. I restarted the NTP service to fix this issue. Run the command 'utils ntp restart' from the cli.

Highlighted

Restarting NTP did not work for me.

 

- CUCM/CUC 12.0 & UCCX 11.6 are all experiencing this.

- Same symptoms as others where CLI shows sync with utils ntp status, but CLI and GUI state "NTP server unreachable" when you login.

- Configuration is pool.ntp.org & time.nist.gov which I realize is abnormal and I should be using an IOS router but that's not an option quite yet.

- utils ntp server add x.x.x.x results in "Inaccessible NTP server. Not added."

Highlighted

I can confirm that this is occurring in UCCX 11.6 and restarting NTP is not resolving the issue.  Anyone else have anything to add on this "cosmetic" bug or could this actually be an issue?

 

VMware Installation:
        2 vCPU: Intel(R) Xeon(R) CPU E5-2630 v3 @ 2.40GHz
        Disk 1: 146GB, Partitions aligned
        10240 Mbytes RAM
        WARNING: NTP server unreachable

admin:utils ntp status
ntpd (pid 1828) is running...

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*66.135.44.92    216.218.254.202  2 u   15   64   17   47.023    1.701   0.387


synchronised to NTP server (66.135.44.92) at stratum 3
   time correct to within 1020 ms
   polling server every 64 s

Current time in UTC is : Thu May 31 16:28:45 UTC 2018
Current time in America/New_York is : Thu May 31 12:28:45 EDT 2018

Highlighted

Hi there

 

You can run utils diagnose test command on CUCM CLI and see the ntp tests are passed. If yes, I dont think you have something to worry about.

 

test - ntp_reachability

test - ntp_clock_drift

test - ntp_stratum

 

 

Hope this Helps

Cheers
Rath!

***Please rate helpful posts***

Highlighted

Content for Community-Ad