Monitor Virtual IP Addresses with NNMi

NNMi discovers and monitors devices such as clustered servers that share a virtual IP address. After a cluster fails over to a new active node, NNMi associates the virtual IP address with the new active node. This association is not immediate, as some time might pass between failover and NNMi discovering the change.

You can take several actions to configure NNMi for your specific situation:

If you want NNMi to monitor a virtual IP address, use only one of the following options:

• Option 1: For this option, NNMi manages N+1 non-SNMP devices, where N represents the number of members in the cluster discovered with a non-virtual IP address. NNMi discovers the additional (+1) non-SNMP node, and it is configured with the virtual IP address.

  Do nothing to stop NNMi from discovering a virtual IP address. Using this approach, NNMi discovers the virtual IP address and the physical IP addresses associated with the Network Interface (NIC) cards on devices configured to use this virtual IP address. NNMi discovers and monitors each device as a separate non-SNMP node.

• Option 2: Configure NNMi to use a device’s physical IP address as the Preferred Management Address of a clustered server. For instructions on how to do this, see the Specific Node Settings Form (Communication Settings) topic in the NNMi help.

  Note NNMi might not immediately recognize the transfer of a virtual IP address from one active node to a new active node. NNMi might show the status of a virtual IP address using a node other than the current active node in the cluster.

If you do not want NNMi to monitor a virtual IP address, do the following using the NNMi console:

1. Click Discovery Configuration in the Configuration workspace.
2. Click the Excluded IP Addresses tab.
3. Add the virtual IP address or range of addresses to the list of addresses to be excluded from discovery.
4. Save your changes.