IPv6 radvd stops working

[mahescho]

Hi,

since I've upgraded to 20.7 about every month radvd stops working and so IPv6 on my internal interfaces as the default route expires and isn't renewed. I've to restart radvd. After this everything is back to normal.

How to debug and fix this?

TIA
Matthias

[Voodoo]

Could be related to my problem as well https://forum.opnsense.org/index.php?topic=19989

Do you also get the system log message:
in6_ifadd: xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx is already configured

?

[mahescho]

I don't think so. There are no "in6_ifadd: xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx is already configured" messages. External IPv6 connectivity works. Only internal systems loose their auto configured default gateway because radvd stops working and so the IPv6 default gateway does not get advertised and times out at the clients. The workaround for my problem is to restart radvd.

[mahescho]

Solution:

https://github.com/opnsense/core/issues/4338