Vyos Router Advertisements ipv6 not running

I have create Router Advertisements but client can not ping out network, it can ping to gateway.
this is my config:

 service {
     router-advert {
         interface eth3 {
             default-preference high
             hop-limit 64
             interval {
                 max 600
             }
             name-server 2409:6a40:0:8::11
             name-server 2409:6a40:0:8::12
             other-config-flag
             prefix 2409:6a40:0:69::/64 {
                 valid-lifetime 2592000
             }
             reachable-time 0
             retrans-timer 0
         }

in my client route show:

Kernel IPv6 routing table
Destination                    Next Hop                   Flag Met Ref Use If
[::]/96                        [::]                       !n   1024 0      0 lo
0.0.0.0/96                     [::]                       !n   1024 0      0 lo
2002:a00::/24                  [::]                       !n   1024 0      0 lo
2002:7f00::/24                 [::]                       !n   1024 0      0 lo
2002:a9fe::/32                 [::]                       !n   1024 0      0 lo
2002:ac10::/28                 [::]                       !n   1024 0      0 lo
2002:c0a8::/32                 [::]                       !n   1024 0      0 lo
2002:e000::/19                 [::]                       !n   1024 0      0 lo
2409:6a40:0:69::/64            [::]                       UAe  256 0      0 eth0
3ffe:ffff::/32                 [::]                       !n   1024 0      0 lo
fe80::/64                      [::]                       U    256 0      0 eth0
[::]/0                         gateway                    UGDAe 1024 2     63 eth0
[::]/0                         gateway                    UGDAe 1024 0      0 eth0
[::]/0                         [::]                       !n   -1  1    168 lo
demo123 . com/128                [::]                       Un   0   3     28 lo
demo123 . com/128                [::]                       Un   0   1      0 lo
demo123 . com/128                [::]                       Un   0   3     12 lo
ff00::/8                       [::]                       U    256 2    433 eth0
[::]/0                         [::]                       !n   -1  1    168 lo

I think it error when running on vrrp, on juniper have config: virtual-router-only; how to config this on vyos

https://phabricator.vyos.net/T840 is about VRRP and RA