Ubiquiti EdgeRouter IPv6 router advert and prefix delegation config

config.snipet

interfaces {
    ethernet eth1 {
        address 10.0.0.1/24
        address 192.168.100.1/24
        address ffff:ffff:ffff:ffff::1/64
        address ffff:ffff:ffff:ffff::1/64
        description Athens
        duplex auto
        firewall {
            local {
                ipv6-name LANv6_LOCAL
            }
        }
        ipv6 {
            dup-addr-detect-transmits 1
            router-advert {
                cur-hop-limit 64
                link-mtu 0
                managed-flag true
                max-interval 600
                name-server ffff:ffff:ffff:ffff::48
                other-config-flag false
                prefix ffff:ffff:ffff:ffff::1/64 {
                    autonomous-flag true
                    on-link-flag true
                    valid-lifetime 2592000
                }
                reachable-time 0
                retrans-timer 0
                send-advert true
            }
        }
        speed auto
    }
}