Modify IPv6 settings in AirPort Utility on Mac
When you use AirPort Utility Setup Assistant to set up your new base station or extend an existing network, it automatically configures the best settings for your network. It’s recommended that you manually configure your base station’s settings only if instructed to do so by your ISP or network administrator.
By default, the base station is set up as a native IPv6 router for global communication on your network. If necessary, you can modify your IPv6 settings using Link-local, Automatic, Manual, Native or Tunnel settings using the instructions below.
Open the AirPort Utility app
on your Mac, located in the Utilities folder in the Applications folder. In the graphical overview, select the base station you want to configure, then click Edit. You may need to enter a password for the base station.
Click Internet, then click the Internet Options button near the bottom of the pane.
Click the Configure IPv6 pop-up menu, then choose one of the following options:
Automatically: This is the default selection. Use Automatically if your ISP provides IPv6 addresses automatically.
Manually: If your ISP provided you with specific IPv6 configuration parameters, choose this option to enter them manually, then do any the following:
Set the IPV6 mode: Choose an IPv6 mode as instructed by your ISP. Native mode connects directly to an IPv6 network; Tunnel mode connects to an IPv6 network through an IPv4 network.
If you choose Native, and if you want to share the IPv6 Internet connection with devices on your network, select Enable IPv6 Connection Sharing.
Enter the information from your ISP in the appropriate fields: IPv6 WAN address, IPv6 default route, IPv6 delegated prefix and IPv6 LAN address.
Note: If you are configuring for IPv6 Tunnel mode, you also need to enter the remote IPv4 address in the Remote IPv4 Address field.
Link-local only: Choose “Link-local only” to limit IPv6 traffic to the local network.
Click Save to close the dialogue, then click Update to save your changes.