Hey Rene Thanks for getting back. Sorry I did not frame my question correctly. I will try again ^_^.
So I was trying to make topology diagram using the OSPF LSDB. I was not able to get the subnet mask for link R1 <–> R5. Then I went through the blog again and found this
“R1 also has two stub networks, one to represent each of the point-to-point links shown above. Without these entries, other routers would not have routing information for the 10.0.15.0/24 and 10.0.12.0/24 subnets.”
That’s what I was missing. I misunderstood the following LSA information with STUB as different loopback interface…
Link connected to: a Stub Network
(Link ID) Network/subnet number: 10.0.15.0
(Link Data) Network Mask: 255.255.255.0
But your blog clearly says that it is for sharing routing information. I should have read that before.
Thanks for your efforts!