Tenda I-WL-D305 User Manual page 59

Step 3: Edit the Enter Service Description. This field is optional. We recommend that you keep the default.
Select a network protocol: IPv6 Only. Click Next.
Step 4: Enter PPP username and its password provided by your ISP. Click Next.
Step 5: Select a preferred wan interface as the system default IPv6 gateway. Click Next.
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