ISIS Comparison With OSPF

ISIS level 1 -> similar to intra area in OSPF
ISIS circuit level 1 and level 2-> similar to border router in OSPF
ISIS DIS -> similar to DR in OSPF

What is ISIS level 2 similar in OSPF? Anyone got a similar analogy?

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EdTheLad

Level 2 is like the backbone
Level 1-2 is the ABR
Level 1 is any area other than the backbone connected to an ABR.

dppagc

level 2 database has routes from both level 1 and level 2 right?

EdTheLad

Quick edit above, level 2 is like the backbone, it will receive the L1 LSPs from the L1L2 router. You should try and learn about the LSPs rather than looking at routes.

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