Packet tracer - NM-2FE2W and router 2811 - Led stay off

[Maxpeigne]

Hi everybody,

It's my first post here! I'm looking into getting the CCNA. I started my studies with the Udemy courses of Neil and I try to do lot of experiences with packet tracer.

I want to connect 1 router to 2 switches in 2 differents subnets. For the router, I choose the 2811 and I added a NM-2FE2W cards.

The connection between the router Spare-0/0 and the Switch1-0/1 is OK, but the connection between the router Spare-1/0 and the Switch2-0/3 is DOWN.

The configuration and the wiring seems good, but the LED between my router and the SW2 stay off.

Have you any idea of the problem?

Thanks!

[Maxpeigne]

As often, I search for 30-45min about the issue, I decide to post a message, and just after, I find how to solve it...

My router was in Haalf dupplex...

[Flavio Miranda]

@Maxpeigne 

Zip your pkt file and share here. 

[Maxpeigne]

There is the project, even if the problem is solved.

I've only 1 question: "When I had my problem, the case "AUTO" was checked. So why the router was still in half duplex?"

[Flavio Miranda]

@Maxpeigne 

 First, switch interface and router interface must match. If you put auto in one side, you need to check the other side and make sure it is also in auto. 

 When you change to auto in PK device, the default is half dupplex, you need to change to full. But it seems to be more like a bug than a device behavior.