Справочник Пользователя для ASUS RT-AC66U

This wireless router supports IPv6 addressing, a system that 

supports more IP addresses. This standard is not yet widely 

available. Contact your ISP if your Internet service supports IPv6. 

To set up IPv6:
1.  From the navigation panel, go to Advanced Settings > IPv6.
2.  Select your Connection Type. The configuration options vary 

depending on your selected connection type.

3.  ENTER your IPv6 LAN and DNS settings.
4.  Click Apply.

NOTE: Please refer to your ISP regarding specific IPv6 information for 

your Internet service.