My LoRa gateway appears not connected but recive dates from my nodes… I need check my gateway traffic 
So what is your question?
Perhaps you should start by explaining what exactly you mean by that, and how you determined it to be the case.
Getting into the gateway by some means (serial port, SSH, etc) and watching logs is often a useful step.
@RCB07 Better respond to questions (e.g. from @cslorabox above) than posting your question in multiple topics (which is not allowed). If needed a reference can be posted in another topic.
For ‘not connected’ see: TTN Console not working properly all the time