OSPF LSA Types
Type 3 and 4 LSA’s
- Called SLA’s (Summary Link Advertisements).
- Generated by ABR’s – they send these LSA’s to all routers in an area.
- advertise intra-area routes to Area 0.
- Advertise both intra and inter-area routes to non-backbone areas.
- They only differ between Type 3 and 4:
- Type 3 advertises networks outside an area, into an area.
- Type 4 advertises information about ASBR’s into an area.