Flooding
of LSP
• After
a node has prepared LSP, it must be scattered to all other nodes, not only to
its neighbors. This process is called flooding, and based on the following:
- The creating node sends a copy of the LSP out of each interface.
- A node that receives a LSP compares it with the copy it may already have.
- If newly arrived LSP is older, than the one it had, then the new one is discarded.
- If newly arrived LSP is newer , then:-
a) Discards the old LSP, and keeps the
new one.
b) Sends a copy of it out of each
interface except the one from which the packet has arrived. This
guarantees that flooding stops somewhere in the domain.
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