Link State Routing Protocols
- Networking Topics
- Routing Protocols
- Link State Routing Protocols
Links state routing is more advanced than any distance vector routing protocol. Link state routing protocols only send out routing updates when a change in the internetwork forces them to change their routing table. When they send out these updates, unlike distance vector routing protocols, link state updates only contain the changes that have occurred in the internetwork they don’t send the whole routing table. These link state updates are called Link State Advertisements (LSA) and are much less bandwidth intensive than sending out the whole routing table.
Each router running a link state routing protocol contains a map of the internetwork from the routers perspective. Each LSA that is received by the router helps keep this topological map up-to-date. Once it receives this LSA it forwards it out all it’s ports to inform it’s peers of the new change.
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