I'm reading through my OSPF network types... and I am having trouble understand the reasoning beind each of the network types:
broadcast
nonbroadcast
point-multipoint
point-to-multipoint nonbroadcast
My understanding is that on a multipoint frame relay network nonbroadcast is the default.
In some instances you will need to set static neighbor commands (nonbroadcast and point-multipoint nonbroadcast) and in some cases you need to do static frame relay mappings to compensation of the partial PVC mesh etc etc.
But as I read all of this I can't help but think "this network type is something that WE, as the network engineer, get to chose. So why, all things being equal, would we not always set the network type to be broadcast and just let the neighbors form dynmically?"
To me it seems like we are not forced to choose any one of those above 4 option over any other. So why, for example, would we ever chose point-to-multipoint non-broadcast?
I'm not sure if I'm explaining myself well. Usually if I study something enough I finally "click" to the overarching idea and can understand how and why all the different pieces fit together. But frame-relay, being one of my weaknesses, is making it difficult for me to understand the idea beind these network types.
Any help would be appreciated. Please let me know if I'm not explaining myself all that well.
Thanks in advance.
