Unlike sysUptime, snmpEngineTime will rollover after 68 years.
So, if sysUpTime resets, then based on the snmpEngineTime we will decide whether there was an actual reboot or it is rollover case.
This issue has been addressed in the following patch. Please contact CA Spectrum Support:
For Spectrum 10.2.3 + Spectrum_10.02.03.BMP_10.2.301 --> Spectrum_10.02.03.PTF_10.2.325
This is also fixed in Spectrum release 10.3.0 and above as noted in the Resolved Issues section of the 10.3 documentation
Resolution: If sysUpTime resets, then based on the snmpEngineTime it will be decided whether there was an actual reboot or not.
(10.3.0, DE356653, 00998222)