7.1 Concepts for state polling
This section provides a brief overview of network monitoring, including the order that the State Poller uses to evaluate polling groups. After reading the information in this section, continue to 7.2 Planning state polling for more specific information.
As with network discovery, focus network monitoring on the critical or most important devices in the network. NNMi can only poll devices in the topology database. You can control which network devices NNMi monitors, the type of polling to use, and the interval at which to poll.
You can use the interface and node settings on the Monitoring Configuration form to refine status polling of devices, and to set different polling types and intervals for different classes, types of interfaces, and types of nodes.
You can configure State Poller data collection to be based on an ICMP (ping) response, or to be based on SNMP data. NNMi automatically handles internally the mapping from the type of data collection you enable to the actual MIB objects, significantly simplifying configuration.
- Note
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If Web Agents are configured (in addition to SNMP Agents), NNMi can use additional protocols (for example, SOAP protocol for VMware environments).
As you plan the polling configuration, carefully consider how to set up interface groups and node groups for the State Poller service. If you are new to the concept of groups, see 4.6 Node groups and interface groups and 4.7 Node/interface/address hierarchy.
- Organization of this section