26.2.2 Restricting name resolution

If you know the restrictions on the DNS (or other name resolution) service, you can instruct NNM and NNMi to avoid looking up these devices. If this step does not apply to your system, go to 26.2.1 Configuring SNMP access.

1. Check the following file and identify the addresses that NNM excludes from address-to-host-name name resolution.

   • Windows: %OV_CONF%\ipnolookup.conf

   • Linux: $OV_CONF/ipnolookup.conf

2. Run the following command and check for the host names NNM excludes from name-to-address name resolution:

   snmpnolookupconf dumpCache > snmpnolookup.out

   

3. Add the addresses from step 1 to the following file:

   • Windows: %NnmDataDir%shared\nnm\conf\ipnolookup.conf

   • Linux: $NnmDataDir/shared/nnm/conf/ipnolookup.conf

4. Add the host names from step 2 to the following file:

   • Windows: %NnmDataDir%shared\nnm\conf\hostnolookup.conf

   • Linux: $NnmDataDir/shared/nnm/conf/hostnolookup.conf

   For details about the format of these configuration files, see the ipnolookup.conf and hostnolookup.conf Reference Pages.

   

   NNMi performs lookup only during discovery. Replicating the NNM nolookup configuration to NNMi automatically improves the spiral discovery action.

5. In NNMi, you can select the DNS host name, IP address, or MIB II sysName to be used as the name label to be displayed. Use the following procedure:

   a. In the NNMi console, open the Configuration workspace.

   b. Choose Discovery > Discovery Configuration.

   c. In the Node Name Resolution area, set up the node name priority.

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