...
- Ensure the "Collect" column reads "true"
- Set the "SNMP Community" column to the community string for that daemon, if you don't have one then it's time to make one up or use NMIS' default "nmisGig8"
- Scroll to the botton and click "Add and Update Node"
- Ensure your device is running an SNMP Daemon service that will allow the community string you specified access
- If SNMP is not configured you will likely see the Node Status as degraded and an Event that says "SNMP Down - SNMP error, Escalate 0, active", if you configured the email you will now also have an email in your inbox regarding the problem
To setup SNMPD / NET-SNMP see the NMIS 8 Installation Guide
Conclusion
For more detailed information on any of these topics or any other topics that are not covered here see NMIS 8 Configuration