OSPFv3: LSAs

OSPFv3 uses many of the same LSAs as OSPFv2 except for using two additional LSAs whose functions are noted below:

Type 1 Router LSA – Describes a router and its links to its neighboring objects within a single area

Type 2 Network LSA РGenerated by DR to represent the multiaccess  transit network and its connection to member routers

Type 3 Inter-Area Prefix LSA – Originated by ABRs to describe inter-area networks in other areas

Type 4 Inter-Area Router LSA – Originated by ABRs to advertise the existence of ASBRs in other areas

Type 5 Autonomous System External LSA – Originated by an ASBR in a Regular area to describe networks learned from other protocols

Type 7 NSSA LSA – Originated by ASBR in an NSSA to describe networks learned from other protocols

Type 8 Link LSA – Advertises link-local address and prefixes of a router to all other routers on the link, as well as option information, this is sent if more than one router is present on a link

Type 9 Intra-Area-Prefix LSA – Performs one of two functions:

  • Associates a list of IPv6 prefixes with a transit network by pointing to a Network LSA
  • Associates a list of IPv6 prefixes with a router by pointing to a Router LSA

 

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