How is a reboot event determined in Performance Management?

Products

• CA Performance Management
• Network Observability

Issue/Introduction

We are seeing a reboot event in PM but the device itself is saying it did not reboot

Cause

The reboot event is determined from sysUpTime and equates to the reboot of the network management portion of the system, not necessarily a restart of the device as a whole but both are typically done at the same time, outside of any defects.

Resolution

A Reboot event is triggered when Performance Management detects a reset of the SNMP oid, sysUptime (1.3.6.1.2.1.1.3).

 

Example:

sysUpTime definition:

sysUpTime OBJECT-TYPE
       SYNTAX      TimeTicks
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
               "The time (in hundredths of a second) since the
               network management portion of the system was last
               re-initialized."
       ::= { system 3 }

 

Value from SAPWALK:

1.3.6.1.2.1.1.3.0             , TimeTicks   , 112001692

 

Conversion from TimeTicks (1/100th of a second each) to Days:

112001692 / 100 = 1120016.92

1120016.92 / 60 = 18666.94866667

18666.94866667 / 60 = 311.11581111

311.11581111 / 24 = 12.9631588

 

So, the network management portion of the system was last re-initialized 12.9631588 days before value in the example SAPWALK was taken