Also important to know are the LSA Types OSPF speaks to other routers

The type indicates and tells something about the area type. The following exist:

  • Type 1  is an info about routers and directly connected links
  • Type 2 info about LAN and routers connected
  • Type 3 Networks reachable outside the area
  • Type 4 reachability info to the autonomous system board from the ABR
  • Type 5 info about destinations outside the OSPF domain from an ASBR
  • Type 6 multicast info
  • Type 7 NSSA area

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