Routing With IS-IS Protocol – Part 5 (IS-IS versus OSPF)

Lets firstly check the similarities of these two protocol one by one:

– IS-IS Protocol and OSPF are both Link-State Interior Gateway Protocols. – IS-IS Protocol and OSPF are both uses Dijkstra SPF (Shortest Path First) algorithm. – These protocols have LSDBs and the LSDB similar structure – Both support VLSM (Variable Length Subnet Mask) – Both are very scalable protocols – Both has a fast convergence time after changes – Both are open standards – Both have hierarchical structures, there are two hierarchy level – Both protocols support LANs and point-to-point protocols in similar ways – Both protocol use periodic Hello messages for neighbour establishment

Now let’s check the differences of these two important protocols: [sc name=”ContentRMessage”]

The other articles on IS-IS Protocol are below:
Routing With IS-IS Protocol – Part 1 Routing With IS-IS Protocol – Part 2 (IS-IS Addresses) Routing With IS-IS Protocol – Part 3 (IS-IS Packet Types) Routing With IS-IS Protocol – Part 4 (IS-IS Adjacency) Routing With IS-IS Protocol – Part 5 (IS-IS versus OSPF) IS-IS For IPv6 – IS-IS For IPv6 Overview IS-IS For IPv6 – IS-IS For IPv6 Configuration on Cisco IOS