Following are the types of LSAs you would usually find in an OSPF network:
Type 1: router LSA — A router sends this to describe neighbors and its own interfaces.
Type 2: network LSA — For broadcast networks only; this LSA is flooded by the DR and lists OSPF-speaking routers on the network.
Type 3: network summary LSA — Sent by an ABR to advertise networks reachable through it. A stub area router will also use this for the default route.
Type 4: ASBR-summary LSA — Sent by ABR, but only internally. This describes to the others how to get to the ASBR itself, and uses only internal metrics.
Type 5: AS-external LSA — Used to describe external routes to internal areas. Can be used to advertise “this is the way to the Internet” (or some subset of).
Type 6: Group summary — Used in multicast (MOSPF). Ignore this.Cisco Routers does not support LSA6.
Type 7: NSSA area import.
Type 8: External Attributes LSA –- This is very rarely deployed and is used when BGP information is carried across OSPF AS.
Type 9, 10, 11 are Opaque LSAs — They are designated for future specifically for application specific purposes.
Last Wiki Answer Submitted: October 16, 2012 3:12 am by chithamba15 pts.