4.2.7 Do-not-discover objects
In NNMi, there are five ways that you can configure NNMi to disregard certain objects:
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On the Communication Configuration form, you can turn off ICMP communication, SNMP communication, or both at different levels: globally for communication regions, or for specific host names or IP addresses. For details about the impacts of disabling one or both of these protocols, see 3.1.6 Polling protocols.
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On the Discovery Configuration form, you can set up an auto-discovery rule that instructs NNMi to never gather hints from certain IP addresses or SNMP system object IDs. Nodes matching the criteria will still appear on the map and in the database, but spiral discovery will not extend to the neighboring devices beyond those IP addresses or object types.
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On the Discovery Configuration form, you can set up an auto-discovery rule that instructs NNMi to exclude from the database specific IP address ranges, IP addresses, or both. Spiral discovery does not display those addresses on any node's list of addresses or use those addresses when establishing connections between devices, so NNMi never monitors the health of those addresses.
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On the Discovery Configuration form, on the Excluded IP Addresses page, you can configure an excluded IP address filter to exclude a range of IP addresses from discovery.
The excluded IP addresses feature works for new and existing nodes. If all of a node's IP addresses are entered into the Excluded IP Addresses list after that node has already been discovered, NNMi does not delete the node. In addition, NNMi does not delete the entire history of a node unless the NNMi administrator intentionally deletes the node from the NNMi database.
When an IP address range is excluded, any overlapping addresses in the static network address translation (NAT), dynamic network address translation (NAT), or port address translation (PAT) area in the network management domain are also excluded.
NNMi uses tenants to support networks containing overlapping address domains. To handle such a network, NNMi uses seeded discovery to place overlapping address domains in different tenants. For details, see NNMi Help.
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On the Discovery Configuration form, on the Excluded Interfaces page, you can select specific types of interfaces to exclude from the discovery process. For details, see NNMi Help.