Using the Polling and Thresholds Console, you can customize ICMP and SNMP polling thresholds for the IP Availability Manager and the IP Performance Manager by modifying default threshold groups, or by creating new threshold groups.
The IP Availability Manager and the IP Performance Manager use the settings in a threshold group to assign threshold parameters to a particular group of managed devices, interfaces, or ports. From a polling and threshold perspective, a setting is a collection of parameters that are common to a particular type of analysis; for example, connectivity polling or environment polling.