D-Link AC1900 User Manual page 48

Section 4 - Con guration
If DHCP-PD is disabled in LAN IPv6 Address Settings:
Enter the starting IPv6 address for the DHCP server's IPv6 assignment.
IPv6 Address
Range (Start):
Enter the ending IPv6 address for the DHCP server's IPv6 assignment.
IPv6 Address
Range (End):
Enter the IPv6 address lifetime (in minutes).
IPv6
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Lifetime:
Click Save when you are done.
D-Link DIR-878 User Manual
Auto Con guration (SLAAC/DHCPv6) (continued)
44