Difference between Distance vector routing and Link State routing
Prerequisite – Classification of Routing Algorithms
Distance Vector Routing –
- It is a dynamic routing algorithm in which each router computes a distance between itself and each possible destination i.e. its immediate neighbors.
- The router shares its knowledge about the whole network to its neighbors and accordingly updates the table based on its neighbors.
- The sharing of information with the neighbors takes place at regular intervals.
- It makes use of Bellman-Ford Algorithm for making routing tables.
- Problems – Count to infinity problem which can be solved by splitting horizon.
– Good news spread fast and bad news spread slowly.
– Persistent looping problem i.e. loop will be there forever.
Link State Routing –
- It is a dynamic routing algorithm in which each router shares knowledge of its neighbors with every other router in the network.
- A router sends its information about its neighbors only to all the routers through flooding.
- Information sharing takes place only whenever there is a change.
- It makes use of Dijkstra’s Algorithm for making routing tables.
- Problems – Heavy traffic due to flooding of packets.
– Flooding can result in infinite looping which can be solved by using the Time to live (TTL) field.
Comparison between Distance Vector Routing and Link State Routing:
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