假设 WAN 口在 eth0 ，运营商给的前缀长度是 60 ，可以配成 DHCPv6-stateless ，记得把防火墙规则给写了：

```

configure
# Configure the PPPoE for IPv6(eth0):
set interfaces ethernet eth0 pppoe 0 ipv6 enable
set interfaces ethernet eth0 pppoe 0 ipv6 address autoconf
set interfaces ethernet eth0 pppoe 0 ipv6 dup-addr-detect-transmits 1
set interfaces ethernet eth0 pppoe 0 dhcpv6-pd pd 0 prefix-length /60
set interfaces ethernet eth0 pppoe 0 dhcpv6-pd rapid-commit enable
set interfaces ethernet eth0 pppoe 0 dhcpv6-pd prefix-only

# Enable IPv6 DHCPv6-stateless on the LAN(switch0):
set interfaces ethernet eth0 pppoe 0 dhcpv6-pd pd 0 interface switch0 host-address ::1
set interfaces ethernet eth0 pppoe 0 dhcpv6-pd pd 0 interface switch0 prefix-id :0
set interfaces ethernet eth0 pppoe 0 dhcpv6-pd pd 0 interface switch0 service dhcpv6-stateless

# Enable IPv6 on switch0:
set interfaces switch switch0 ipv6 dup-addr-detect-transmits 1
set interfaces switch switch0 ipv6 router-advert cur-hop-limit 64
set interfaces switch switch0 ipv6 router-advert link-mtu 0
set interfaces switch switch0 ipv6 router-advert managed-flag false
set interfaces switch switch0 ipv6 router-advert max-interval 600
set interfaces switch switch0 ipv6 router-advert other-config-flag false
set interfaces switch switch0 ipv6 router-advert prefix '::/64' autonomous-flag true
set interfaces switch switch0 ipv6 router-advert prefix '::/64' on-link-flag true
set interfaces switch switch0 ipv6 router-advert prefix '::/64' valid-lifetime 259200
set interfaces switch switch0 ipv6 router-advert reachable-time 0
set interfaces switch switch0 ipv6 router-advert retrans-timer 0
set interfaces switch switch0 ipv6 router-advert send-advert true

# create a policy for WAN->Router:
set firewall ipv6-name WANv6_LOCAL default-action drop
set firewall ipv6-name WANv6_LOCAL description 'Local network traffic'
set firewall ipv6-name WANv6_LOCAL enable-default-log
set firewall ipv6-name WANv6_LOCAL rule 10 action accept
set firewall ipv6-name WANv6_LOCAL rule 10 description 'Allow established/related sessions'
set firewall ipv6-name WANv6_LOCAL rule 10 state established enable
set firewall ipv6-name WANv6_LOCAL rule 10 state related enable
set firewall ipv6-name WANv6_LOCAL rule 20 action drop
set firewall ipv6-name WANv6_LOCAL rule 20 description 'Drop invalid state'
set firewall ipv6-name WANv6_LOCAL rule 20 state invalid enable
set firewall ipv6-name WANv6_LOCAL rule 30 action accept
set firewall ipv6-name WANv6_LOCAL rule 30 description 'Allow IPv6 icmp'
set firewall ipv6-name WANv6_LOCAL rule 30 protocol icmpv6
set firewall ipv6-name WANv6_LOCAL rule 40 action accept
set firewall ipv6-name WANv6_LOCAL rule 40 description 'allow dhcpv6'
set firewall ipv6-name WANv6_LOCAL rule 40 destination port 546
set firewall ipv6-name WANv6_LOCAL rule 40 protocol udp
set firewall ipv6-name WANv6_LOCAL rule 40 source port 547

# create a policy for WAN->LAN Clients:
set firewall ipv6-name WANv6_IN default-action drop
set firewall ipv6-name WANv6_IN description 'WAN inbound traffic to the router'
set firewall ipv6-name WANv6_IN enable-default-log
set firewall ipv6-name WANv6_IN rule 10 action accept
set firewall ipv6-name WANv6_IN rule 10 description 'Allow established/related sessions'
set firewall ipv6-name WANv6_IN rule 10 state established enable
set firewall ipv6-name WANv6_IN rule 10 state related enable
set firewall ipv6-name WANv6_IN rule 20 action drop
set firewall ipv6-name WANv6_IN rule 20 description 'Drop invalid state'
set firewall ipv6-name WANv6_IN rule 20 state invalid enable
set firewall ipv6-name WANv6_IN rule 30 action accept
set firewall ipv6-name WANv6_IN rule 30 description 'Allow IPv6 icmp'
set firewall ipv6-name WANv6_IN rule 30 protocol icmpv6
set firewall ipv6-name WANv6_IN rule 40 action accept
set firewall ipv6-name WANv6_IN rule 40 description 'allow dhcpv6'
set firewall ipv6-name WANv6_IN rule 40 destination port 546
set firewall ipv6-name WANv6_IN rule 40 protocol udp
set firewall ipv6-name WANv6_IN rule 40 source port 547
set firewall ipv6-receive-redirects disable
set firewall ipv6-src-route disable
set interfaces ethernet eth0 pppoe 0 firewall in ipv6-name WANv6_IN
set interfaces ethernet eth0 pppoe 0 firewall local ipv6-name WANv6_LOCAL

commit
save
exit

```