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IS-IS Protocol, Address Format

IS-IS Protocol Addresses IS-IS (Intermediate System to Intermediate System) Protocol was developed as a OSI network protocol, not TCP/IP. So, normally IS-IS Protocol not uses IP address, but it uses NET (Network Entity Title) addresses. Let’s check this address issue a little. In IS-IS Protocol, NSAP (Network Service Access Point) is used as network layer […]

Basic IS-IS Topology, Level 1, Level 2, Level 1/2 Routers

Routing With IS-IS Protocol IS-IS (Intermediate System to Intermediate System Protocol is a Link-State routing protocol that is developed by ANSI ISO. It is an open standard and classless Interior Gateway Protocol (IGP). IS-IS Protocol uses Dijkstra SPF (Shortest Path First) algorithm like OSPF, to build the IS-IS Protocol databases and calculate the best path. […]


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