This topic is to discuss the following lesson:
trying to change topology to speak via point-topoint over a switch. do u recommend any way to take a look at switche’s configuration
Hello Konstantinos
You can configure your OSPF network between two routers to be a point-to-point network type. More information about this can be found in the following lesson:
Now the lesson describes such a network-type configuration over a Frame-Relay network. However, this can also be configured over ethernet links. And these ethernet links can be directly connected between routers, or they can indeed go over a switch.
Now, if the switch is a Layer 2 switch, it plays no part in any Layer 3 operations, such as sharing OSPF routes or routing traffic. All Layer 3 communication takes place directly between the two OSPF routers. As a result, to answer your question, you require no specialized configuration on the switch to make this operate correctly. You simply must make sure that both routers are connected to ports on the same VLAN on the switch.
I hope this has been helpful!
Laz
Very cool lesson, though I’m wondering if there is a diagram error at a couple points.
It appears R5 accidentally gets drawn as connected to the DR in the “middle” for the 123 subnet. This happens at the end of the part going thru R1 (https://cdn.networklessons.com/wp-content/uploads/2014/08/R1-OSPF-full-picture-links.png ) , disappears for awhile, and then comes back in the R5 section (e.g., https://cdn.networklessons.com/wp-content/uploads/2014/08/OSPF-LSDB-view-of-R5.png and most that follow).
It seems the stub network of 15.0/24 (corresponding to point-to-point link up to R1) is inadvertently connected all the way to the DR instead of just being a stub.
Hello Nathan
Yes, you are correct, that diagram does show a link between R5 and the DR, which should not be there (and then it correctly disappears on the subsequent diagrams.) I will let Rene know to take a look and make any modifications needed.
Thanks again!
Laz
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