For previous post about DR and DBR in OSPF...Click here...dr-and-bdr-concepts-in-ospf
LSA Types in OSPF
OSPF relies on several types of Link State Advertisements
(LSAs) to communicate link state information between neighbours. A brief
review of the most applicable LSA types:
LSA Types:
- Type
1 - Represents a router
- Type
2 – Network LSA (who is my DR)
- Type
3 - A network link summary all
ABR (internal route)
- Type
4 - Represents an ASBR (who is
my ASBR)
- Type
5 - A route external to the OSPF
domain
- Type
6 – Group membership Multicasting
- Type 7 - Used in stub areas in place of a type 5 LSA
