7.2.1 Polling checklist

You can use the checklist below to plan for State Poller configuration.

[Figure] What can NNMi monitor?

[Figure] What are the logical groups for monitored items, based on object type, location, relative importance, or other criteria?

[Figure] How often does NNMi need to monitor each group?

[Figure] What data needs to be collected to capture information about the monitored item? This might include:

-- ICMP (ping) response

-- SNMP fault data

-- Additional SNMP component health data

Note: If Web Agents are configured (in addition to SNMP Agents), NNMi can use additional protocols (for example, SOAP protocol for VMware environments).

Organization of this subsection

(1) Example polling configuration

(1) Example polling configuration

To help you understand the polling configuration process, consider this example. Assume that your network contains the latest proxy servers from ProximiT. You must ensure that these devices can be reached, but you do not require SNMP monitoring of the proxy servers.

What can NNMi monitor?

Because you can only monitor what has been discovered, you configure auto-discovery rules to ensure that NNMi's database contains your proxy servers. For details about configuring discovery, see 6. NNMi Discovery.
What are the logical groups for monitored items?

It makes sense to group the ProximiT proxy servers together and apply the same monitoring settings to all of them. Because you are not doing interface (SNMP) monitoring for the devices, you do not need any interface groups.

You can also use this node group to filter views, to check the status of the proxy servers as a group, and to put the group out of service to update firmware.
How often does NNMi need to monitor each group?

For your service level agreements, a five-minute polling interval for the proxy servers is sufficient.
What data needs to be collected?

Here is where the monitoring configuration differs from other groups. For our proxy server example, you enable ICMP fault monitoring and disable SNMP fault polling monitoring. Without SNMP fault monitoring for the group, component health monitoring will not apply.
Which SNMP traps are sent from my network devices to NNMi?

NNMi uses some SNMP traps to poll devices as the traps are received without waiting for the next polling interval.

For more detailed planning information concerning these configuration choices, see the following topics:

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