anchor.diff:      RespElements = ac_info_version(join, Version) ++ [#result_code{result_code = 0}],
       Header = #capwap_header{radio_id = RadioId, wb_id = WBID, flags = Flags},
       State = send_response(Header, join_response, Seq, RespElements, State1),
  -    SessionOpts = wtp_accounting_infos(Elements, [{'TP-CAPWAP-Radio-Id', RadioId}]),
  +    SessionOpts = wtp_accounting_infos(Elements, [{'CAPWAP-Radio-Id', RadioId}]),
       lager:info("WTP Session Start Opts: ~p", [SessionOpts]),
       ctld_session:start(Session, SessionOpts),
       next_state(join, State);
  
positive.code:     wtp_accounting_infos(Elements, Acc1);
  wtp_accounting_infos([{session_id, Value}|Elements], Acc)
    when is_integer(Value) ->
      Acc1 = [{'TP-CAPWAP-Session-Id', <<Value:128>>}|Acc],
      wtp_accounting_infos(Elements, Acc1);
  wtp_accounting_infos([_|Elements], Acc) ->
      wtp_accounting_infos(Elements, Acc).
  
negative.code: join({configuration_status_request, Seq, Elements, #capwap_header{
  					   radio_id = RadioId, wb_id = WBID, flags = Flags}},
       State) ->
      SessionAttrs = ['CAPWAP-Power-Save-Idle-Timeout',
                      'CAPWAP-Power-Save-Busy-Timeout',
                      'CAPWAP-Echo-Request-Interval',
                      'CAPWAP-Discovery-Interval',
                      'CAPWAP-Idle-Timeout',
  