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Topology database when LSU packets arrive from the link that is down? #232

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Once a link failure detected (link state changes), router has to update the topology database (removing it) and floods LSU messages for the other routers to be get notified.

However, in PA4, we do not simulate link failures or state changes, so you don't need to handle them. You only need to focus on building topology database and Dijkstra's algorithm.

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Answer selected by livelykitten
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