Thanks for the help on the OSPF questions - this to me raises a few additional questions.
1. An ethernet LAN is certainly multiaccess, but what about when there is nothing on this LAN but 2 routers,
with a 30 bit mask. While the medium is multiaccess, the topology is point to point. Does the medium or the topology decide whether to use "ip ospf network point-to-point" or "ip ospf net broadcast"?
I think that typically you would not have such a setup, so this problem would not normally come up, and we would not have to question very hard whether to use point-to-point or broadcast, etc. Again, I did not come up with this topology, it was handed to me and not expected for me to change it.
2. This topology is basically a mesh of routers connected by ethernet segments. It is not FULLY meshed, i.e. every router is not directly conencted to every other router. In fact almost all the ethernet segments have nothing but the 2 routers on each end, and nothing else on the segment. So it's essentially a bunch of "point to point" ethernet links. It is NOT a heirarchical topology.
Given this, how does the concept of stub networks fit in? Every single link is expected to be used as a route when it provides the shortest metric route to the destination. And another thing is that links which do not have their own entries in the LS DB actually DO get used to route traffic when they are the best choice.
Thanks again
1. An ethernet LAN is certainly multiaccess, but what about when there is nothing on this LAN but 2 routers,
with a 30 bit mask. While the medium is multiaccess, the topology is point to point. Does the medium or the topology decide whether to use "ip ospf network point-to-point" or "ip ospf net broadcast"?
I think that typically you would not have such a setup, so this problem would not normally come up, and we would not have to question very hard whether to use point-to-point or broadcast, etc. Again, I did not come up with this topology, it was handed to me and not expected for me to change it.
2. This topology is basically a mesh of routers connected by ethernet segments. It is not FULLY meshed, i.e. every router is not directly conencted to every other router. In fact almost all the ethernet segments have nothing but the 2 routers on each end, and nothing else on the segment. So it's essentially a bunch of "point to point" ethernet links. It is NOT a heirarchical topology.
Given this, how does the concept of stub networks fit in? Every single link is expected to be used as a route when it provides the shortest metric route to the destination. And another thing is that links which do not have their own entries in the LS DB actually DO get used to route traffic when they are the best choice.
Thanks again
