To change the source node based on a custom attribute sent in an SNMP trap in NNMi, you can follow these steps:

docs.microfocus.com/.../NodeSettingSNMPTIncident

Configure Node Settings for an SNMP Trap Incident:

NNMi enables you to apply incident configurations to a source node based on its participation in a node group.

Custom Attribute Extraction:

First, ensure that your SNMP trap includes the custom attribute you want to use as the source node.

Modify Incident Configuration:

Go to the NNMi console and navigate to the incident configuration settings.
Find the incident configuration associated with SNMP traps.
Edit the configuration to include a rule that extracts the custom attribute value from the trap and sets it as the source node.
You can use the combination of the nnmloadmib.ovpl and nnmincidentcfg.ovpl --loadTraps command-line tools to create new trap configurations

Testing and Verification:
Test the configuration by sending an SNMP trap

Hello,

It would be useful to get some details on how the integration was done. For example, if you use nnmsnmpnotify.ovpl in NNMi actions you could add the option [-a agent_addr]  which will override the source node IP/name. From my understanding all traps received by 3rd party application have a source IP of NNMi server. Is it correct?

Best regards,

Sergey Pankratov