It's better to use English then more people can understand what you mean. Because this is an English community.

@Raphael_Maria 

Acredito que estou com o mesmo problema, porém na minha máquina simplesmente cai e não retorna mais. No meu caso, fica a led na cor laranja e mostrando que esta com uma conexão de 10Mpbs.Além disso, perde o IP, ficando aqueles Auto-Atribuído.

Resumindo, fico sem conexão total com a rede.

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I believe I have the same problem, but on my machine it just falls and doesn't come back. In my case, the LED is in orange and showing that it has a 10Mbps connection. Also, it loses the IP, getting those self-assigned.

In short, I am completely disconnected from the network.

@Andone 

I am practically, I believe, with the same or very similar problem.

I am using a manageable switch T2500G-10TS today