You can enable cluster-level, automatic network configuration for the SP (recommended). You can also leave the SP automatic network configuration disabled (the default) and manage the SP network configuration manually at the node level. A few considerations exist for each case.
The SP automatic network configuration enables the SP to use address resources (including the IP address, subnet mask, and gateway address) from the specified subnet to set up its network automatically. With the SP automatic network configuration, you do not need to manually assign IP addresses for the SP of each node. By default, the SP automatic network configuration is disabled; this is because enabling the configuration requires that the subnet to be used for the configuration be defined in the cluster first.
If you enable the SP automatic network configuration, the following scenarios and considerations apply:
The reconfiguration could result in the SP being assigned a different address, which might have an impact on your DNS configuration and its ability to resolve SP host names. As a result, you might need to update your DNS configuration.
When the SP automatic network configuration is enabled, the command only allows you to enable or disable the SP network interface.
If the SP automatic network configuration is disabled (the default), the following scenarios and considerations apply:
A node that joins the cluster also uses IPv4 DHCP for its SP network configuration by default.
A warning message appears when you attempt to manually configure the SP network with addresses that are allocated to a subnet. Ignoring the warning and proceeding with the manual address assignment might result in a scenario with duplicate addresses.
If the SP automatic network configuration is disabled after having been enabled previously, the following scenarios and considerations apply: