AI, ML, Development + Cisco Learning Blog Learning about Machine Learning, Artificial Intelligence, related devlopment topics and formerly Routing and Switching, Datacenter, Security and other topics, CCIE #23664, Frank Wagner

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