Dell Latitude E6320 (Early 2011) - Manual (Page 39)

Type the IPv6 Default Router and press .
5. Preferred DNS IPv6 Address
Under the Wired LAN IPv6 Configuration select Preferred DNS IPv6 Address and press .
Type the Preferred DNS IPv6 Address and press .
6. Alternate DNS IPv6 Address
Under the Wired LAN IPv6 Configuration select Alternate DNS IPv6 Address and press .
Type the Alternate DNS IPv6 Address and press .