Type 1 is a router LSA. They are produced by every router and are flooded only within the area in which they originated.
Type 2 is a network LSA. They are produced by the DR and represents a pseudonode (virtual).
It lists all attached routers and is only flooded within originating area.
Type 3 is a Network summary LSA. They are produced by an ABR. They are sent into a single area to advertise destinations outside it.
Type 4 is an ASBR Summary LSA. They are produced by an ABR. They are the same as a type 3 but advertise the destination to an ASBR not a network. This will be a host address as it is a route to a router.
Type 5 is an AS External LSA . Produced by an ASBR and advertise external destinations (outside the OSPF AS) or a default route. They are flooded within the AS.
Type 7 is a NSSA External LSA. Originated by an ASBR within a not so stubby area. It is like a type 5 but instead of it being flooded within the AS it is only flooded within the NSSA where it came from.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...