Thanks Andrey, ipv6_ra_mode needs to be empty, and the subnet gateway ip needs to be the link-local address from which the external router is sending its RAs. Could you try that and see if it works? Thanks.
Thanks Andrey, ipv6_ra_mode needs to be empty, and the subnet gateway ip needs to be the link-local address from which the external router is sending its RAs. Could you try that and see if it works? Thanks.