Diameter Signaling Router (DSR) : How To Correct Network Time Protocol (NTP) Alarms on DSR Servers

(Doc ID 2361375.1)

Last updated on FEBRUARY 21, 2018

Applies to:

Oracle Communications Diameter Signaling Router (DSR) - Version DSR 7.0.1 and later
Information in this document applies to any platform.

Symptoms

If the Network Time Protocol (NTP) times drift significantly among DSR servers, a number of alarms can arise up to and including application database alarms.  These may include:

Platform/SW CRITICAL 31235 Untrusted Time After Initialization
TPD/PLAT CRITICAL 32117 NTP Offset Check Failure
TPD/PLAT MAJOR 32342 NTP Offset Check Failure
TPD/PLAT MINOR 32509 Server NTP Daemon Not Synchronized
TPD/PLAT MINOR 32520 NTP Stratum Check Failure
Platform/SW MINOR 31100 DB Replication Fault

Among other possible alarms.

Another symptom is the very high offset and jitter observed when querying the NTP daemon at the command line.  Example:

 

Changes

Changes triggering this condition can include a network disruption or a critical server in the NTP topology path becoming unavailable for some duration.  It can also occur due to  manual changes made to NTP settings along servers in the NTP data path. 

Cause

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