DHCP6c does not support AFTR-Name option described in RFC 6334 which provides FQDN of Address Family Transition Router that is used by Dual-Stack Lite solution allowing IPv4 and IPv6 connectivity to customers that are addressed only with an IPv6 prefix (no IPv4 address is assigned to the attachment device).
Current behaviour
Currently DHCP6c can not ask DHCPv6 server for AFTR-Name option (errors out with unknown option in configuration) and if such option is recived form DHCPv6 server it is ignored.
Log message from DHCP6c: unknown or unexpected DHCP6 option opt_64, len 21
Description
DHCP6c does not support AFTR-Name option described in RFC 6334 which provides FQDN of Address Family Transition Router that is used by Dual-Stack Lite solution allowing IPv4 and IPv6 connectivity to customers that are addressed only with an IPv6 prefix (no IPv4 address is assigned to the attachment device).
Current behaviour
Currently DHCP6c can not ask DHCPv6 server for AFTR-Name option (errors out with unknown option in configuration) and if such option is recived form DHCPv6 server it is ignored. Log message from DHCP6c:
unknown or unexpected DHCP6 option opt_64, len 21