09-09-2008 03:55 AM - edited 03-15-2019 01:08 PM
I have a cluster 6.1(2) with a publisher and a subscriber.
On the publisher the NTP is correctly synchronised with an external Catalyst 6500. The publisher should update the subscriber with the correct time but it doesn't do that.
On the publisher:
admin:utils ntp status
ntpd (pid 5654) is running...
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.1.0 127.127.1.0 10 l 42 64 377 0.000 0.000 0.008
*10.16.63.10 127.127.7.1 10 u 714 1024 377 71.184 -37.782 9.862
193.35.65.120 0.0.0.0 16 u - 256 0 0.000 0.000 4000.00
synchronised to NTP server (10.16.63.10) at stratum 11
time correct to within 37 ms
polling server every 1024 s
Current time in UTC is : Tue Sep 9 11:48:27 UTC 2008
Current time in CET is : Tue Sep 9 13:48:27 CEST 2008
On the subscriber:
admin:utils ntp status
ntpd (pid 25396) is running...
remote refid st t when poll reach delay offset jitter
==============================================================================
*127.127.1.0 127.127.1.0 10 l 62 64 377 0.000 0.000 0.008
synchronised to local net at stratum 11
time correct to within 11 ms
polling server every 64 s
Current time in UTC is : Tue Sep 9 11:49:36 UTC 2008
Current time in CET is : Tue Sep 9 13:49:36 CEST 2008
I done some change on ntp master on the catalyst to change the stratum ( >9 ), and I restarted on both servers the NTP ( utils ntp restart). This is sufficient or do I have to restart the servers?
Thank in advance for any help.
Regards
Giovanni
09-09-2008 07:43 AM
I've has intermittent success using 65xx as a NTP reference. According to TAC, devices will not sync when a NTP is referenced from most catalyst switches.
If you have a Cisco router (NTP must be in sync), try pointing NTP on the CM's to the router and see if it helps.
HTH
- Warren
09-09-2008 11:48 PM
Hi Warren,
thank you for your response. I configure on CM a router as NTP server but I have the same issue. On the router the NTP is in sync as you can see below :
voicegwmi1#sh ntp statu
Clock is synchronized, stratum 8, reference is 127.127.7.1
nominal freq is 250.0000 Hz, actual freq is 249.9954 Hz, precision is 2**18
reference time is CC71F839.DD8CAD1D (09:39:37.865 CET Wed Sep 10 2008)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 236352.25 msec, peer dispersion is 236352.25 msec
Regards
Giovanni
09-10-2008 06:45 AM
Try using a external NTP server, like a trusted NTP reference on the Internet. Looks like the router is sync'd up internal, I've seen issues with that before.
09-10-2008 08:06 AM
But if I using an external NTP the stratum value is lower than 8, so I don't match the requirement of Cisco than wants stratum 9 in the CallManager.
Regards
Giovanni
09-10-2008 08:23 AM
You could try dropping the stratum level of the router to something below 9, that might help. However, below is a setup I've got working.
Below is NTP information from a Call Manager cluster that is NTP sync'd to a IOS router. The IOS router is sync'd to NTP servers on the Internet. Let me know if this helps.
Router#show ntp associations
address ref clock st when poll reach delay offset disp
+~66.250.45.2 209.51.161.238 2 998 1024 377 0.000 2.048 18.683
*~64.73.32.134 65.212.71.102 2 546 1024 377 0.000 -1.509 18.685
+~69.16.152.68 209.81.9.7 2 549 1024 377 0.000 13.418 14.831
* sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured
Router#
Rotuer#show run | include ntp
ntp server 66.250.45.2
ntp server 64.73.32.134 prefer
ntp server 69.16.152.68
Router#
******** Call Manager Subscriber NTP Info
admin:utils ntp status
ntpd (pid 8452) is running...
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.1.0 127.127.1.0 10 l 3 64 377 0.000 0.000 0.004
*10.10.128.20 10.10.128.10 4 u 82 128 377 0.172 -0.060 0.014
synchronised to NTP server (10.10.128.20) at stratum 5
time correct to within 102 ms
polling server every 64 s
Current time in UTC is : Wed Sep 10 16:08:57 UTC 2008
Current time in America/Chicago is : Wed Sep 10 11:08:57 CDT 2008
admin:
******** Call Manager Publisher NTP Info
admin:utils ntp status
ntpd (pid 8708) is running...
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.1.0 127.127.1.0 10 l 33 64 377 0.000 0.000 0.008
*10.10.128.10 64.73.32.134 3 u 602 1024 377 1.153 -0.118 0.035
synchronised to NTP server (10.10.128.10) at stratum 4
time correct to within 95 ms
polling server every 1024 s
Current time in UTC is : Wed Sep 10 16:12:05 UTC 2008
Current time in America/Chicago is : Wed Sep 10 11:12:05 CDT 2008
admin:
09-10-2008 08:44 AM
Forgot to mention IP's, from the post above...
Router: 10.10.128.10
Publisher: 10.10.128.20
Subscriber: 10.10.128.21
09-11-2008 06:27 AM
Hi,
I linked the NTP to an internet server but no changes, the issue is present again.
The router's config about NTP is like your config.
I think that I should take a ethernet trace , but this is a remote site and will do that in the next mouths.
Thank you
Regards
Giovanni
09-11-2008 07:11 AM
Hi,
I'm looking with the browser in the "Cisco Unified Reporting" page and under "Unified CM Data Summary" the value on the row "NTP server" is 0.
Can you check if also on your server is the same??
Thank you
Giovanni
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