Configuring PowerHA SystemMirror service IP labels and IP addresses

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Service IP labels and IP addresses are used to establish communication between client nodes and the server node. Services, such as a database application, are provided using the connection made over the service IP label.

About this task

The /etc/hosts file on all nodes must contain all IP labels and associated IP addresses that you will define to the cluster, including service IP labels and addresses.

To define service IP labels for your cluster, complete the following steps:

Procedure

  1. From the command line, enter smit sysmirror
  2. In SMIT, select Cluster Applications and Resources > Resources > Configure Service IP Labels/Addresses > Add Service IP Label/Address and press Enter.
  3. Fill in field values as follows:
    Table 1. Add Service IP Label/Address fields
    Field Value
    IP Label/IP Address Select from the picklist or enter the service IP label/address to be kept highly available.

    The name of the service IP label/address must be unique within the cluster and distinct from the volume group and resource group names; it should relate to the application it serves, as well as to any corresponding device, such as websphere_service_address.
    Network Name Enter the symbolic name of the PowerHA® SystemMirror® network on which this Service IP label/address will be configured. If you leave the field blank, PowerHA SystemMirror fills in this field automatically with the network type plus a number appended, starting with 1, for example, netether1.
    Netmask(IPv4)/Prefix Length(IPv6) For the configuration of the IP version 4 service interface, enter the network mask for the address. For the configuration of the IP version 6 service interface, enter the prefix length for the address.

    This field is not a required field. If you do not enter a value, the prefix length or netmask of the underlying network is used. If a prefix length value or netmask value is specified, it is checked for compatibility with the underlying network.
  4. Press Enter after filling in all required fields. PowerHA SystemMirror checks the validity of the IP interface configuration.
  5. Repeat the previous steps until you have configured all service IP labels for each network, as needed.