Setting up your Bridge

You CAN use DHCP, or you can use a static address. It doesn’t matter. 

Editar o Arquivo 

"/etc/network/interfaces and bridging"

To make your bridge a little more permanent, you’re gonna need to edit /etc/network/interfaces. Using our example names, make it look like this and you’re set (if you want to use DHCP):

Adicionar as linhas e pronto a placa eth0 e eth1 
recebera o ip do roteador 
O micro so joga da eth0 pra eth1 os dados

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auto lo br0

iface lo inet loopback

iface eth0 inet manual

iface eth1 inet manual

iface br0 inet dhcp
      bridge_ports eth0 eth1

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