My weekend study for Certification CCNA R&S In this month, I had been that when I studied for CCNA so and finaly. I decided to want the CCNA certification, My step first being the past Saturday for the afternoon, I make labs of switching in specific goals, for example, EtherChannel and VLAN. I used devices for my labs, for example, the series Catalyst 2900 and 3500, this ultimate is Layer 3. I had been problems with it makes config my labs with EtherChannel because my interface FastEthernet did not run in speed 100, I put config with speed mode automatic. Well, it is was a major problem. The next week I will be making configuration with routers in specific goals, for example, OSPF and EIGRP.