|-------------|
		|-------|Modem telecom|---------\	 /Serial0 ip 192.168.0.2/30 	
		|	|-------------|		 \	/
		|			  	  \-----|--------------|fastethernet0 ip 192.168.2.1/29
internet---------			  	        |Roteador 1720 |--------------------------------|
		|			  	  /-----|--------------|fastethernet0 ip 192.169.3.1/29	|	
		|       |-------------|	  	 /	\						|
		|-------|Modem Telecom|---------/	 \serial 1 ip 192.168.1.2/30			|
			|-------------|									|
													|eth0 192.168.2.2/29
													|eth0:0 192.168.3.2/29
												----------------
												|servidor linux|
												|	       |
												----------------