Dear OSPF gurus:
I am probably missing a very basic point here as I am somewhat new to
OSPF. I have been debugging ospf adjacency, ospf events, ospf flood
plus some others. After routers become adjacent, the flooding process
starts. What I have noticed is that right after routers become
adjacent, they create a new router LSA and add one to the sequence
number. (The DR also sends out a network LSA.)
My question is this: Does each router create this new instance of the
LSA to trigger the flooding process itself or is there some other reason
why a "new" LSA is created? *Why not just send out the original LSA to
begin the flooding process?* Doesn't sending out a new LSA cause
routers to recalculate their routing tables when, in fact, they just
calculated them moments ago when they became adjacent using the original
LSA?
I understand the need for the flooding process. I don't understand the
need for a new LSA.
Thanks in advance,
Scott Chapin
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