Hitachi

JP1 Version 12 JP1/Network Node Manager i Setup Guide


5.5 Tuning communications

Reducing authentication failures

If NNMi is generating too many authentication traps during discovery, configure smaller regions or specific nodes with smaller groups of access credentials for NNMi to try.

Tuning timeouts and retries

When NNMi attempts to contact a device using SNMP during discovery, the communication configuration determines whether NNMi can gather the necessary device information. When the communication configuration does not include the correct SNMP community strings, or if NNMi is discovering non-SNMP devices, NNMi uses the configured settings for SNMP timeouts and retries. In this case, large timeout values or a high number of retries can negatively affect the overall performance of discovery. If your network contains devices that you know respond slowly to SNMP/ICMP requests, consider using the Regions or Specific Node Settings tabs on the Communication Configuration form to fine-tune the timeout and retry values for just these devices.

Reducing default community strings

Having a large number of default community strings can negatively affect discovery performance. Instead of entering many default community strings, fine-tune the community string configuration for particular areas of your network by using the Regions or Specific Node Settings tabs on the Communication Configuration form.