diff --git a/apps/sdlan/src/sdlan_stun.erl b/apps/sdlan/src/sdlan_stun.erl
index d4978af..635651e 100644
--- a/apps/sdlan/src/sdlan_stun.erl
+++ b/apps/sdlan/src/sdlan_stun.erl
@@ -139,6 +139,7 @@ handle_info({udp, _, _Ip, _Port, <<?PACKET_STUN_DATA, Body/binary>>}, State = #s
     Data = catch sdlan_pb:decode_msg(Body, sdl_data),
     maybe
         #sdl_data{network_id = NetworkId, src_mac = SrcMac, dst_mac = DstMac, ttl = TTL} ?= Data,
+        logger:debug("[sdlan_stun] forward data, network_id: ~p", [NetworkId]),
         {ok, NetworkPid} ?= sdlan_network:lookup_pid(NetworkId),
         %% 重新打包数据ttl需要减1
         NData = sdlan_pb:encode_msg(Data#sdl_data{ttl = TTL - 1, is_p2p = false}),