When a router receives an LSP on a broadcast network or a P2P network enabled with IS-IS, the router needs to send a PSNP to ensure LSDB synchronization.

Question

Quizplus · Accepted Answer

When a router receives an LSP on a broadcast network or a P2P network enabled with IS-IS, the router needs to send a PSNP to ensure LSDB synchronization. This is because the router needs to inform its neighbors that it has received the LSP and that it is now up to date with the latest LSDB information.

When a Router Receives an LSP on a Broadcast Network