How to setup IKEv2 on Windows 8
Open your network settings.
Click on "Add a VPN connection".
Click on "Connect to a workplace".
Click on "User my internet connection (VPN)".
Fill the blanks as shown below then click on "Create".
You should see progress as following.
Open Network Connections again.
Right click on the connection you just created then click "Properties".
Fill the blanks as shown below.
You can now connect to VPN.