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NTP Reference CUCM 6.0.1 2000-3

Unanswered Question
Jan 29th, 2008
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The clocks on the phones are slipping and can not be sync'd with the Domain Controllers. I have an open TAC case (one month and counting) and just realized I never asked the EXPERTS.

Here's the error when trying OS Administration/Settings/NTP Servers "The NTP service is accessible"

I've tried off net and on net NTP sources. The latest was just on net, to make sure it's not a firewall issue.

Any suggestions?

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Tommer Catlin Tue, 01/29/2008 - 14:27
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Log into the SSH and check the clock settings to see what it says on the Linux level.

utils ntp

This command displays the NTP status or configuration.

Command Syntax

utils ntp {status | config}

James Hawkins Tue, 01/29/2008 - 14:52
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I have always just specified the NTP servers during the initial install for both CM5.x and 6.x and have never had a problem.

I normally sync the CCM servers to the network core switches (6500 or 4500) or, for smaller networks, to ISR routers. These devices are hen synced to an authoritive time source.

The output below shows the NTP status from my Publisher

admin:utils ntp status

ntpd (pid 8273) is running...

remote refid st t when poll reach delay offset jitter

============================================================================== 10 l 40 64 377 0.000 0.000 0.008

+ 3 u 254 256 377 1.162 4.499 0.145

* 3 u 197 256 377 1.054 -1.523 0.079

synchronised to NTP server ( at stratum 4

time correct to within 118 ms

polling server every 256 s

Current time in UTC is : Tue Jan 29 22:48:24 UTC 2008

Current time in Europe/London is : Tue Jan 29 22:48:24 GMT 2008



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