18.3.3 Setting application failover communications
During installation, NNMi queries all network interface cards (NICs) on the system to find one to use for cluster communications. If your system has multiple NICs, you can use the following procedure to choose the NIC to use for nnmcluster operations:
- Important
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Make sure to specify the setting if either of the nodes has multiple NICs.
Run nnmcluster -interfaces to list all available interfaces.
For details, see the nnmcluster Reference Page.
Edit the following file:
Windows: %NnmDataDir%conf\nnm\props\nms-cluster-local.properties
Linux: $NnmDataDir/conf/nnm/props/nms-cluster-local.properties
Locate the line containing text similar to the following:
com.hp.ov.nms.cluster.interface=value
Change the value as desired.
The interface value must pertain to a valid interface; if it does not, the cluster might not start.
An example of the value is eth3 that was output by nnmcluster -interfaces in step 1.
In Windows, the description of the system interface is displayed following the value such as eth3.
Map the interface to be used with the value such as eth3 by checking the description of the interface by using a command such as ipconfig /all.
In Linux, the name of the interface is displayed. Check the name of the interface to be used by using a command such as ifconfig.
- Important
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The active server and the standby server must be able use all of the IPv4 addresses of the NIC used for cluster communication to communicate with the other NNMi management server for which application failover is configured. If there is any IPv4 address that cannot be used to communicate with the other management server, application failover configuration might fail, or the behavior of a configured application failover environment might become corrupted.
Save the nms-cluster-local.properties file.
The com.hp.ov.nms.cluster.interface parameter permits an NNMi administrator to select the communication interface to be used for nnmcluster communication. Make sure that the IP address obtained from the NIC specified in com.hp.ov.nms.cluster.interface matches the IP address that can be resolved from the host name specified in com.hp.ov.nms.cluster.member.hostnames. In an environment where multiple IP addresses are resolved to the same host name, specify the IP address used for application failover communication, not the host name, in the com.hp.ov.nms.cluster.member.hostnames parameter. Specify the com.hp.ov.nms.cluster.member.hostnames parameter in the following file:
Windows: %NnmDataDir%shared\nnm\conf\props\nms-cluster.properties
Linux: $NnmDataDir/shared/nnm/conf/props/nms-cluster.properties