If, during a rediscovery, the SNMP agent of a system fails authentication, the IP Manager notifies a DiscoveryError. In the Notification Log Console, you can determine the reason for the error by double-clicking the DiscoveryError notification and viewing the Details tab in the Notification Properties dialog box. Alternatively, in the Topology Browser Console, you can determine the reason for the error by double-clicking the name of the failed system and viewing the Attributes tab in the system’s properties dialog box.
For an SNMPv1 or v2c agent, the most likely reason for this error is that the read community string for the agent has changed. Incorrect read community string provides information about errors that concern an incorrect read community string.
For an SNMPv3 agent, the most likely reason for this error is that the authentication password, authentication protocol, or username for the agent has changed. “ Seed file format provides information about SNMPv3 options.