13.6.7 NNMi calculations for state and status

By default, NNMi automatically enables ICMP polling of each node's management address, including nodes residing in a NAT environment (Configuration > Monitoring > Monitoring Configuration, the Default Settings tab, ICMP Fault Monitoring section's Enable Management Address Polling setting). If you have a NAT environment, we recommend that you do not disable this setting.

Important

In the Inventory > Node view, select a node and use the Actions > Configuration Details > Monitoring Settings command. The displayed information indicates whether NNMi has this management address polling enabled

When management address polling is enabled, the Agent ICMP State field appears in the following locations:

• Node form

• SNMP Agent form

• SNMP Agent table views

The following table shows how NNMi behavior changes based on the ICMP Fault Monitoring settings.

Table 13‒3: Monitoring configuration settings and the resulting State Poller behavior

ICMP fault monitoring settings		Management ICMP address state IP address state
Enable management address polling	Enable IP address fault polling	Agent ICMP state	IP address state
Enabled#	Disabled#	Polled	Not polled
Enabled	Enabled	Polled	Polled
Disabled	Disabled	Not polled	Not polled
Disabled	Enabled	Not polled	Polled

#: Default settings

When management address polling is enabled, NNMi considers both the management address's ICMP response and the SNMP agent's response when calculating conclusions and generating incidents.

The following table shows the SNMP agent status calculations determined by the combined ICMP and SNMP responses.

Table 13‒4: Determining SNMP agent status

SNMP agent's response	Management address's ICMP response	Resulting SNMP agent status
Responding	Responding	Normal
Responding	Not responding	Minor
Not responding	Responding	Critical
Not responding	Not responding	Critical

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