Windows clients cannot access public ipv6 unless a few miniutes later while use fw4 nat

[xiedeacc]

my openwrt version was 22.03.0-rc1, this version use fw4, I add masq6 option to firewall and enabled ipv6 nat. but windows cannot access public ipv6, after a few minutes, things goes well, but fw3 doesn't have this problem? is route advertisement problem? how to make it quckly?

[xiedeacc]

does this problem relate to RA Flags, how to set RA Flags?

root@OpenWrt:~# cat /etc/config/dhcp

config dnsmasq
        option domainneeded '1'
        option boguspriv '1'
        option filterwin2k '0'
        option localise_queries '1'
        option rebind_protection '1'
        option rebind_localhost '1'
        option local '/lan/'
        option domain 'lan'
        option expandhosts '1'
        option nonegcache '0'
        option authoritative '1'
        option readethers '1'
        option leasefile '/tmp/dhcp.leases'
        option resolvfile '/tmp/resolv.conf.d/resolv.conf.auto'
        option nonwildcard '1'
        option localservice '1'
        option ednspacket_max '1232'

config dhcp 'lan'
        option interface 'lan'
        option start '100'
        option limit '150'
        option leasetime '12h'
        option dhcpv4 'server'
        option dhcpv6 'server'
        option ra 'server'
        list ra_flags 'none'

config dhcp 'wan'
        option interface 'wan'
        option ignore '1'

config odhcpd 'odhcpd'
        option maindhcp '0'
        option leasefile '/tmp/hosts/odhcpd'
        option leasetrigger '/usr/sbin/odhcpd-update'
        option loglevel '4'

[xiedeacc]

it turns out accept_ra config problem, all.accept_ra not take effect, mus specify wan interface

net.ipv6.conf.default.accept_ra = 2
net.ipv6.conf.all.accept_ra = 2

add below fixed this problem

net.ipv6.conf.eth0.accept_ra = 2