Dear, for consulting something specific, I am currently passing the network with OSPF, but I have a question.
Is it advisable to make a network without the Backbone 0 area?
Could a multi-area network be made without the Backbone 0? the issue is that I configured with the backbone but when wanting to pass internet traffic did not go out, I had to make a tunnel to be able to get traffic out of navigation, but I did with direct areas, and traffic could leave without any problem, now the query would be, how necessary is the backbone area, at the moment I put it into practice with the GNS3 in the following way as the graph.
Or the correct way would be like in this second graph that I show that it is from my network itself?
If this is correct, the configuration would be similar to the first one of the graphic but with the difference that the Backbone is added or is there something more specific that would have to be done so that the traffic passes only with masking on the Printipal Edge Team?