NTP error while insalling cucm 8.5 subscriber

[osama_abdo]

Please find below the error i'm facing :

the output of "utils ntp status" is

admin:utils ntp status

ntpd (pid 4814) is running...

     remote          refid     st t when poll reach   delay   offset jitter

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

10.0.1.21       10.0.1.22       3 u   21   64 377   0.346 126.507 51.418

10.0.1.22       10.0.1.22       2 u  14   64 377   0.239 129.458 45.550

unsynchronised

time server re-starting

   polling server every 64 s

Current time in UTC is : Sun Sep 25 14:48:24 UTC 2011

Current time in Africa/Harare is : Sun Sep 25 16:48:24 CAT 2011

------------------------------------------------------------------------------------------------------------------------------------------------------------------

The two server are used to install publisher and both  are accessible when navigating from OS any one has an explanation ,and why it's

unsynchronized .

[Carlo Poggiarelli]

Hi Osama.

Did you add this node to server list on the first node?

Check also the hostname/ip address you configured on this node during setup.

Hope this help.

Regards

Carlo

[osama_abdo]

Many thanks Carlo .

Yes i checked the publisher configuration for that sub ,also the hostname/ip address of publisher is correct .

[Carlo Poggiarelli]

Hi Osama.

Can you post the output of a "show network cluster" ?

Thanks

Carlo

[Jonathan Schulenberg]

Are the two IPv4 addresses shown there full NTPv4-compliant servers? Most noteably Windows servers are not since they use SNTP. A good test of this is whether Catalyst/ISR hardware is capable of syncronziing with those IP addresses. SNTP is a stripped down version of NTP that misses

My guess is they are Windows hosts since: a) they are in the middle of a subnet; b) they are providing enough data for ntpd to see their stratum and such; and, c) ntpd is still choosing not to syncronize with them. That is exactly how an NTPv4 compliant server will behave when trying to pull time from an SNTP server.

[osama_abdo]

Amazing

thanks so much jonathan I'll check and give feed back,any doc. should I read to get more info. also your recommendation to my case is highly appreciated .

[keithknowles]

It has been my experience that using a Windows based NTP (or SNTP to be more accurate) server for your CUCM envronment is bad mojo.  Get a Linux server (or the like) on the network and use it for NTP, it can also provide a good SFTP location for backups and a spare TFTP server for phones if you need it to.  I know Linux can be a pain, expecially if you are unfamiliar with it but i does really provide the best platform for these functions.

[David Koll]

I ran into this same issue trying to build a cluster offline with no access to the internet.  I was using Windows Server as NTP.  Showed up as accessible in the web GUI but unsynchronized from CLI.  I ended up installing NetTime (http://www.timesynctool.com/) on my Windows servers and used it as the NTP server instead and CUCM was able to synchronize and I was able to complete the installation of the subscriber node.

[Aman Soi]

Hi David,

Thanks for sharing the info on NetTime[+5].

Is it just a matter of installing this tool when on Windows Machine when we do not have internet access or do we need to more configs related to NTP?

regds,

aman

[David Koll]

Yes, I installed this on a Windows server that did not have Internet access.  I'm rebuilding my cluster offline to avoid hours of downtime.  I have to reinstall my 9.1.1 cluster with a clean OVA template because it detects unaligned partitions after I upgraded to 9.2

[A00460610]

Have you found a solution to this? I'm installing CUCM (8.5), Unity, UCCX (8.5) on a UCS-C200-M2 and keep having this issue, I've installed the OS on al vmware machines, but can't get throught the setup process, because I keep getting the NTP inaccessible message (on al servers). I have tested connectivity to the LAN, I can even ping my servers (vmware servers) from other computers but can't get it to recognize any ntp server (local or public). I can't login to the CLI because it won't take my user/password; i guess they are still in default. Help!

[A00460610]

Answering my own question, NTP server has to have a low stratum (say 1-8) otherwise, CUCM, UNITY, UCCX will just ignore it, i found a stratum 1 public server and got it working =D

[osama_abdo]

Great news you've solved your issue ,could you help me where to read about this NTP

stratum thing .

[A00460610]

Info about cucm ntp stratum:

http://www.networkworld.com/community/node/59350

NTP stratum 1 public servers:

http://support.ntp.org/bin/view/Servers/StratumOneTimeServers

[Calin Lupas]

Many thanks, A00460610!

I know for sure that my publisher 8.6 in a lab - virtual machine on vmware - has connectivity but the NTP client couldn't connect to any NTP server.

I tried NIST ntp addresses, Windows NTP as a services on UDP 123 on a pc/desktop but no success.

Your solution worked very well. Thank you so much, again!