NTP synchronised to unspecified at stratum 8

[venky]

Hi All,

Can anyone explain what does the below error means in RTMT. We are receiving this error messages continuously in RTMT on unity publisher.

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Dec 17 2017 02:49:02.554 UTC : %UC_RTMT-2-RTMT_ALERT: %[Name=SyslogSeverityMatchFound][Detail= At Sat Dec 16 21:49:02 EST 2017 on node CUCS2, the following SyslogSeverityMatchFound events generated: #012SeverityMatch : Critical#012MatchedEvent : Dec 16 21:48:42 CUCS2 user 2 platform: Primary node NTP server, CUCS1, is currently inaccessible or down. Verify the network between the primary and secondary nodes. Check the status of NTP on both the primary and secondary nodes via CLI 'utils ntp status'. If the network is fine, try restarting NTP using CLI 'utils ntp restart'.#012AppID : Cisco Syslog Agent#012ClusterID : #012NodeID : CUCS2#012 TimeStamp : Sat Dec 16 21:48:42 EST 2017][App ID=Cisco AMC Service][Cluster ID=][Node ID=CUCS1]: RTMT Alert#012

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I have logged in the device and verified the NTP Status and got the below output.And also we are able to reach the NTP server from the device.

admin:utils ntp status

ntpd (pid 4674) is running...

     remote           refid      st t when poll reach   delay   offset  jitter

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

 10.3.50.205     10.3.50.248      6 u  245 1024  377    3.250  -1575.7  64.095

 10.3.50.206     10.3.50.205      7 u  485 1024  377    0.228  -1555.0  65.608

 10.20.3.10      10.3.50.205      7 u  249 1024  377    0.236  -60.602   2.072

synchronised to unspecified at stratum 8

   time correct to within 3241 ms

   polling server every 1024 s

Current time in UTC is : Sun Dec 17 10:58:00 UTC 2017

Current time in America/New_York is : Sun Dec 17 05:58:00 EST 2017

admin:utils diagnose test

Log file: platform/log/diag2.log

Starting diagnostic test(s)

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

test - disk_space          : Passed (available: 18784 MB, used: 9465 MB)

skip - disk_files          : This module must be run directly and off hours

test - service_manager     : Passed                     

test - tomcat              : Passed                     

test - tomcat_deadlocks    : Passed                     

test - tomcat_keystore     : Passed                     

test - tomcat_connectors   : Passed                      

test - tomcat_threads      : Passed                     

test - tomcat_memory       : Passed                     

test - tomcat_sessions     : Failed - The following web applications have an unusually large number of active sessions: perfmonservice2.  Please collect all of the Tomcat logs for root cause analysis: file get activelog tomcat/logs/*

skip - tomcat_heapdump     : This module must be run directly and off hours

test - validate_network    : Passed                     

test - raid                : Passed                     

test - system_info         : Passed (Collected system information in diagnostic log)

test - ntp_reachability    : Passed              

test - ntp_clock_drift     : Passed              

test - ntp_stratum         : Failed                            

skip - sdl_fragmentation   : This module must be run directly and off hours

skip - sdi_fragmentation   : This module must be run directly and off hours

Diagnostics Completed

 The final output will be in Log file: platform/log/diag2.log

 Please use 'file view activelog platform/log/diag2.log' command to see the output

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Can any one guide me how can resolve this issue and what are the steps i have take to resovle this.

I belive the ntp_stratum vaule 8 is not a issue for time synchronition.

Thanks.

[Jonathan Schulenberg]

A subscriber should sync to it’s publisher. Verify that “utils diagnose test” passes on the publisher as well as what it’s NTP situation is. It should be synced to a Stratum 2 or better server so the subscriber stays above Stratum 5. If it’s wrong then the subscriber will be too.

Remember that you cannot sync to a Windows w32time process as it does not run an NTPv4 complaint implementation of NTP.

[venky]

Hi  Jonathan,

Thanks for your assistance.

We are receiving this alerts on Unity publisher.

 I have performed diagnose test and get the below output.

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admin:utils diagnose test

Log file: platform/log/diag3.log

Starting diagnostic test(s)

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

test - disk_space          : Passed (available: 18784 MB, used: 9465 MB)

skip - disk_files          : This module must be run directly and off hours

test - service_manager     : Passed                     

test - tomcat              : Passed                     

test - tomcat_deadlocks    : Passed                      

test - tomcat_keystore     : Passed                     

test - tomcat_connectors   : Passed                     

test - tomcat_threads      : Passed                     

test - tomcat_memory       : Passed                     

test - tomcat_sessions     : Failed - The following web applications have an unusually large number of active sessions: perfmonservice2.  Please collect all of the Tomcat logs for root cause analysis: file get activelog tomcat/logs/*

skip - tomcat_heapdump     : This module must be run directly and off hours

test - validate_network    : Passed                     

test - raid                : Passed                     

test - system_info         : Passed (Collected system information in diagnostic log)

test - ntp_reachability    : Passed              

test - ntp_clock_drift     : Passed              

test - ntp_stratum         : Failed                            

skip - sdl_fragmentation   : This module must be run directly and off hours

skip - sdi_fragmentation   : This module must be run directly and off hours

Diagnostics Completed

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can you explain why this alerts triggrered and how can we reslove this issue.

Thanks.

[Rajan · Accepted solution]

Hi Venky,

in the diagnose test, we could clearly see the NTP test failed. It could be attributed to the type of NTP server, stratum or reachability of NTP server from Pub. As Jonathan pointed out, windows server as an NTP server is not supported for UC applications.

- Can you check whats your NTP server ?
- Set the stratum of NTP server to a lower value
- Check the reachability between Pub and NTP server

HTH
Rajan
Pls rate all useful posts

[venky]

Hi Rajan,

Sorry for the delay to giving the reply.

As per instruction i have verified the configuration and found the windows server is configured as NTP server. Now i changed the IOS device as my NTP server. The issue got resolved now.

Thank you very much your help.

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admin:utils ntp status
ntpd (pid 26468) is running...

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*10.3.50.205     129.250.35.250   3 u   32 1024  377    3.172   -7.119   9.071
+10.3.50.206     10.3.50.205      4 u 1016 1024  377    0.342    3.811   9.889
+10.20.3.10      10.3.50.205      4 u  976 1024  377    0.140   13.811   8.997


synchronised to NTP server (10.3.50.205) at stratum 4
   time correct to within 173 ms
   polling server every 1024 s

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But i have one question can you please tell me why the windows server is not supported as a NTP server for UC applications.

Thank you very much your help.