This is a summary of OSPF LSA Types and where they are present:
LSA Type/Name | Area 0 | Standard Area | Stub Area | NSSA | TSA |
1 – Router | x | x | x | x | x |
2 – Link | x | x | x | x | x |
3 – Network-Summary | x | x | x | x | blocked |
4 – ASBR Summary | x | x | not generated | blocked | blocked |
5 – AS External | x | x | blocked | blocked | blocked |
7 – NSSA external | 7 to 5 | n/a | n/a | x | n/a |