Netmap showing gray traffic

Why netmap is showing gray traffic of my interfaces? See this print (I've removed the net prefix for security reasons): [image: Imagem inline 1] In the above example, I've put in evidence the conection beetween 251.245 and 251.247. Here are those interface graphs: *251.245:* [image: Imagem inline 3] *251.247:* [image: Imagem inline 4] -- Att. Bruno Galindro da Costa