27D-Link DSL-2745 Wireless N300 ADSL2+ Modem Router User Manual
Section 4 - Conguration
IPv6 Local Network (continued)
Prefix length: Enter the prex length.
Preferred Time: Enter the preferred amount of time the address is used for.
Valid Time: Enter the amount of time the address is valid for.
IPv6 DNS Mode: Select either Auto or Manual.
The following settings are available if IPv6 DNS Mode is set to Manual:
DNS Servers: Enter up to three IPv6 DNS servers.
Click Apply Changes when you are done.