IS-IS Protocol and OSPF have some similarities and differences.
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:
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
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gokhankosem
Gokhan Kosem is a Network Engineer, Instructor and the Founder of IPCisco.com with 15+ years of experience in Cisco, Nokia, Huawei, Juniper, Linux, Service Provider Networks, Routing and Switching technologies.
He has worked on the backbone networks of major service providers and network vendors including Nortel, Alcatel-Lucent (Nokia) and has extensive hands-on experience with Cisco, Huawei, Juniper and Nokia networking technologies.
He has trained thousands of networking students worldwide through IPCisco.com, Udemy, books, labs, quizzes, and educational content across multiple social media platforms.
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