01-16-2014 06:17 AM - edited 03-16-2019 09:17 PM
We're running CUCM Ver 7.1.5, the time stamp on all the phones is 4 minutes fast. How do you resolve this issue?
Phones installed include: 7962, 7942, 7911, 7912, 7937, 7940, 7941.
01-16-2014 06:20 AM
SIP or SCCP load?
Is the time off from what CUCM is showing?
What is the firmware version?
Chris
01-16-2014 06:49 AM
Chris
SCCP42.9-1-1SR1S
I'm new at this, where do I find the CUCM time?
01-16-2014 07:07 AM
Use the command "show status" in the CLI or go to show > System in the OS Administration page.
Gareth
01-16-2014 07:15 AM
Thanks Gareth
Yes the time stamp is the same as the phones.
01-16-2014 07:18 AM
What does "utils show ntp" show? Make sure your CUCM is synched with NTP.
Chris
01-16-2014 07:39 AM
Chris,
I don't see "Utils" on any of the Pull Down Menus on the OS Administration page. Under settings I see the NTP Server is the Publisher and the Status="The NTPService is accessible".
01-16-2014 07:54 AM
This is from CLI, loging via SSH to the publisher and issue this command.
Chris
01-16-2014 08:36 AM
Chris,
When I issued the command "utils show ntp" at the CLI admin: prompt
The sytem returns: Executed Command unsuccessful, No valid command entered.
01-16-2014 08:40 AM
Try:
utils ntp status
Gareth
01-16-2014 08:52 AM
My guess is that you'll end up referring to a new NTP server at the end of this. Etiher a self built one, or pointing to your windows DC.
Gareth
01-16-2014 09:04 AM
Gareth,
OK if that's where I'm going with this I think I'll call Cisco TAC for support, I didn't think this would be such a big deal with the time stamp. Thanks to all for the help.
01-16-2014 08:56 AM
That got it, the time stamp is four minutes fast, just like the phones.
01-16-2014 10:56 AM
Cheajt,
If your NTP is not synchronized, the phones will use the time configured on the switch that they're directly connected to. You will need to verify your NTP source to fix the synchronization.
HTH
Regards,
Yosh
01-16-2014 11:05 AM
There really isn't much to setting an ntp reference in CUCM. You probably already have an NTP for your existing network switches, but if not, there are plenty of examples on the interwebs. I personally set up a small VM with CentOS just for ntp services for switches and UC devices. (Linux NTP Setup). Once that is done, follow this guide to configure the publisher for the new NTP server. Note that at the end, you will have to reboot the whole cluster:
"After deleting, modifying, or adding the NTP server, you must restart all other nodes in the cluster for the changes to take affect."
Gareth.
P.S: As I've just found out, Windows NTP servers are not supported:
Cisco recommends synchronizing Unified CM with a Cisco IOS or Linux-based NTP server. Using Windows Time Services as an NTP server is not recommended or supported because Windows Time Services often use Simple Network Time Protocol (SNTP), and Linux-based Unified CM cannot successfully synchronize with SNTP.
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/netstruc.html#wp1185637
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