Draytek Vigor2860 User Manual page 170

It provides 2 daemons for LAN side IPv6 address configuration. One is SLAAC(stateless) and
the other is DHCPv6 (Stateful) server.
Available settings are explained as follows:
Item
Enable
WAN Primary Interface
Static IPv6 Address
configuration
Unique Local Address
(ULA) configuration
156
Description
Check the box to enable the configuration of LAN 1 IPv6
Setup.
Use the drop down list to specify a WAN interface for IPv6.
IPv6 Address –Type static IPv6 address for LAN.
Prefix Length – Type the fixed value for prefix length.
Add – Click it to add a new entry.
Delete – Click it to remove an existed entry.
Such feature is used for the host without assigned IPv6
address to obtain IPv6 address automatically or have an IPv6
address specified manually via ULA configuration. It is
convenient for communication among different subnets.
Vigor2860 Series User's Guide