If a candidate system does not match the IP address of any discovery filter, the IP Manager discards the system.
For a candidate system that matches the IP address of a discovery filter, the IP Manager uses the SNMP port, SNMP version, access mode, and read community string values that are associated with the filter to poll the candidate system. For a non-extended filter, the polling values are identified in “Core fields” on page 179. For an extended filter, the polling values are identified in “Extended options” on page 179.
If the polling of the candidate system fails, the IP Manager either discards the system or places the system on the Pending Devices list. If the ICMP polling fails after the allotted number of ICMP retries, the IP Manager discards the candidate system. If the SNMP polling fails after the allotted number of SNMP retries, the IP Manager responds in one of two ways, depending on the value of the ShowPendingNONSNMP parameter in the discovery.conf file:
If ShowPendingNONSNMP is FALSE (default), the IP Manager discards the candidate system.
If ShowPendingNONSNMP is TRUE, the IP Manager places the candidate system on the Pending Devices list.
The ShowPendingNONSNMP parameter is described in the IP Manager Reference Guide.