We are running Cisco Unified CM version 8.6.1 and I am having an issue with getting NTP to work properly. In our enterprise environment, all devices on the network update their clocks to a Catalyst 6513 in our data center running as an NTP server. Here is the NTP configuration on the switch:
ntp clock-period 17180065
ntp server 188.8.131.52
I have confirmed that the outside NTP server is synching with the 6513 chassis switch:
APHA-B1R18-6513#sh ntp status
Clock is synchronized, stratum 2, reference is 184.108.40.206
nominal freq is 250.0000 Hz, actual freq is 249.9971 Hz, precision is 2**18
reference time is D3D0090B.367A1A06 (18:26:19.212 edt Fri Aug 10 2012)
clock offset is 0.0789 msec, root delay is 57.79 msec
root dispersion is 15875.09 msec, peer dispersion is 15875.02 msec
APHA-B1R18-6513#sh ntp associations
address ref clock st when poll reach delay offset disp
However, when I add the IP address of the 6513 to the CUCM publisher, it fails to synchronize the time. I have tried configuring another NTP server on a 2650XM router and I have tried redirecting the CUCM publisher to the IP address of that router but it still will not synchronize the time. We're currently not using and authentication with NTP.
Has anybody else experienced this problem? Is there a fix? Any assistance would be appreciated.
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