在 LuCI 先删除 Global ULA-Prefix ，然后修改 /etc/config/dhcp 如下（对照修改）：

config dhcp ‘lan’
option interface ‘lan’
option start ‘100’
option limit ‘150’
option leasetime ’12h’
option ra ‘hybrid’
option dhcpv6 ‘hybrid’
option ndp ‘hybrid’
option ra_management ‘1’

config dhcp ‘wan6’
option interface ‘wan’
option dhcpv6 ‘hybrid’
option ra ‘hybrid’
option ndp ‘hybrid’
option master ‘1’

然后执行

/etc/init.d/odhcpd restart
如果开启负载均衡
负载均衡》策略》备用成员》balanced 默认（使用主路由表）