The Enterprise Manager sends SNMP traps to configured SNMP managers/listeners. This happens when alerts are triggered and an SNMP alert action is configured.
SNMP traps use fixed unique Object IDs (OID) and these are translated with the SNMP OID prefix of "c."
e.g. TimestampOID (Alert triggered time) has OID=1 and translates to 18.104.22.168.4.1.722.214.171.124 when the SNMP Trap is received
The full list of the SNMP Alert Action OIDs is included in the APM 9.5 Workstation Guide, under the section "SNMP Alert Action Object IDs".
Note: OIDs 20-24 were introduced in APM v9.1 and OID 25 was introduced in v9.1.1
Environment: Introscope from 9.1x until current release
At this stage, there is no "out of the box" MIB file for the CA APM SNMP traps. So, users create typically their own MIB based on the list of OIDs provided in the APM User Guide.
APM-ALERT-SMI1-MIB.TXT is a sample MIB file for reference which will need to be customized according to what is included in the EM's SNMP Traps.
For instance, OIDs 21 - 24 are only generated if the Triage map alerts are used, and OID 25 is the EM Host OID which should be present at all times (starting from the 9.1.1.release).
Currently there is only one Trap Type (=1) for all the traps generated.