_ (parameter_problem, 0, erroneous_header_field) \
_ (parameter_problem, 1, unrecognized_next_header) \
_ (parameter_problem, 2, unrecognized_option) \
+ _ (parameter_problem, 3, first_fragment_has_incomplete_header_chain) \
_ (router_renumbering, 0, command) \
_ (router_renumbering, 1, result) \
_ (node_information_request, 0, data_contains_ip6_address) \