6.2.6 Rediscovery interval
NNMi rechecks the configuration information from each device in the database according to the configured rediscovery interval. In addition, NNMi collects the ARP cache from each router covered by an auto-discovery rule and looks for new nodes on the network.
Any change in the communication-related configuration of a device, such as interface renumbering, automatically triggers NNMi to update its data for that device and its neighbors.
The following changes do not trigger automatic rediscovery; devices are updated only at the configured rediscovery interval:
Changes within a node (for example, firmware upgrade or system contact)
New nodes added to the network
Select the rediscovery interval to match the level of change in the network. For a highly-dynamic network, you might want to use the minimum interval of 24 hours. For more stable networks, you can safely extend that period.