3. NNMi Communications

NNMi uses both Simple Network Management Protocol (SNMP) and Internet Control Message Protocol (ICMP ping) to discover devices and to monitor device status and health. To establish viable communication in your environment, you configure NNMi with the access credentials and appropriate timeout and retry values for different devices and areas of your network. You can disable a protocol in some areas of your network to reduce traffic or to respect firewalls.

The communication values that you configure form the foundation of NNMi discovery and state polling. NNMi applies the appropriate values for each device when making queries for discovery or polling. Thus, if you configure NNMi to disallow SNMP communication within some region of your network, neither NNMi discovery nor NNMi state polling can send SNMP requests to that region.