question about bridge ipv6 (SLAAC) gateway in freebsd15 ?

[fff2024g]

dear all:
my pc have only one physical network card em0 , then i have create bridge and add em0 as memeber . let this bridge get ipv4 and ipv6 (SLAAC) . this bridge get ipv4 and gateway was normal....but this bridge can get ipv6 with ipv6 gateway correctly ....below was my configuration :

1. add net.link.bridge.inherit_mac=1 to /etc/sysctl.conf

2.

ifconfig_em0="-tso -vlanhwtso up"
create_args_bridge5="inet6 auto_linklocal -ifdisabled addm em0 name public"
cloned_interfaces="bridge5"
ifconfig_public="inet 10.0.0.7/24"
defaultrouter="10.0.0.1"
ifconfig_public_ipv6="inet6 accept_rtadv"

i have read booking : https://wiki.freebsd.org/crest/the-correct-way-to-configure-bridges-in-freebsd-for-ipv6-and-ipv4

the pc boot finished . pc will get ipv6 and ipv6 gateway always . .but after 5minutes. the ipv6 gateway disappeared .....please help me. thanks..

 

[SirDice]

Firewall blocking IPv6 RAs?

 

[fff2024g]

Firewall blocking IPv6 RAs?

no, i can get ipv6 default gateway . but pass a random time. the default gateway will disappear automaticlly...i don't why...thanks.

 

[SirDice]

From the linked wiki page, did you also enable rtsold(8)?

   6 sysrc rtsold_flags='-i -m bridge0'
   7 sysrc rtsold_enable='YES'

 

[fff2024g]

From the linked wiki page, did you also enable rtsold(8)?

   6 sysrc rtsold_flags='-i -m bridge0'
   7 sysrc rtsold_enable='YES'

dear SirDice :
i have fellow https://wiki.freebsd.org/crest/the-correct-way-to-configure-bridges-in-freebsd-for-ipv6-and-ipv4 ... but i still not get stable ipv6 gateway for my bridge ....
if i want to ipv6 work normal . i need to configure a ipv6_defaultrouter="fe80::1$xxxxx" by manual..
if i configure ipv6 default gateway manuallly...i will get double gateway.. please see below inform.
Internet6:
Destination Gateway Flags Netif Expire
::/96 link#2 URS lo0
default fe80::1%public UG public
default fe80::1%public UGS public
::1 link#2 UHS lo0