Pre-configuration for Selecting IP Mode

During a fresh installation, an appropriate IP mode (IPv4 single stack, IPv6 single stack, or Dual IP-stack) is selected as default in the IP configuration wizard. The IP mode selection is based on the IP addresses assigned to the interface. You can accept the default or change the deployment mode.

Ensure that the selected IP mode has an appropriate IP address configured on the Interface for all nodes.

The following table describes the IP mode configuration on interface and the corresponding operational IP mode:


IP Mode Configuration on VM Interface	Operational IP Mode
If IPv4 address is configured and no IPv6 address is configured on gateway interface	IPv4 single-stack mode
If IPv4 address and IPv6 address with global scope are configured on gateway interface	Dual IP-stack mode
If no IPv4 address is configured on gateway interface and only IPv6 address with global scope is configured	IPv6 single-stack mode

During installation, system launches the following wizard to select a deployment mode. You can either accept or change the operational mode.

Note

If you select IPv4 single-stack, wizards for an optional VIP6 and sub-interface optional IPv6 address will be skipped.
If you select IPv6 single-stack, all inputs will be IPv6 address.
On the server's IPv6 IP-stack, add a default route with the following syntax:
```
sudo ip -6 route add default via [gateway-ipv6] dev [gateway-interface]
```
For example,
```
sudo ip -6 route add default via 2000::5:204:96ff:fed6:f288 dev eth0
```
If you select Dual IP-stack, wizard will be the same as the previous release. If you skip adding an optional VIP6, IP mode will change back to IPv4.