After struggling a while with odhcpd and route propagation I wanted to report that I got ipv6 working with the following config for 6relayd.
config server se00
list network se00
option rd server
option dhcpv6 server
option management_level 1
config server sw00
list network sw00
option rd server
option dhcpv6 server
option management_level 1
config server sw10
list network sw10
option rd server
option dhcpv6 server
option management_level 1
Hope this can be of use to someone or contribute to the next release :)
BR,
Vincent