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Tag Archives: isis mtu mismatch

IS-IS MTU Mismatch

IS-IS is a link-state routing protocol, it uses the concept of distributed map/database and local computation , each router originates an LSP to describes himself , this LSP carries links and topological information, reach router on the domain generates its own LSP and relays other routers LSPs untouched (With respect to the Level that the LSP originated in) this information is used to build up the distributed map, a local computation is then performed on the database to extract IP reachability information to formalize the forwarding plane. What is the problem? IS-IS is an extended protocol by nature, Initially it …

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