Information Technology Reference
In-Depth Information
Ta b l e 1 1- 6
OSPFv3 LSA Types
LSA Name
LS
Type
Description
NSSA Type 7 LSA
0x2007
Routers to networks external to the autonomous system, in-
jected into the NSSA
Link LSA
0x0008
Link-local addresses and list IPv6 prefixes associated with
the link
Intra-area-prefix LSA
0x2009
IPv6 prefixes associated with a router, a stub network, or an
associated transit network segment
Router LSAs describe the cost and state of all the originating router's interfaces. These
LSAs are flooded within the area only. Router LSAs are LS type 0x2001. No IPv6 prefixes
are contained in this LSA.
Network LSAs are originated by DRs in broadcast or NBMA networks. They describe all
routers attached to the link that are adjacent to the DR. These LSAs are flooded within the
area only. The LS type is 0x2002. No IPv6 prefixes are contained in this LSA.
Interarea-prefix LSAs describe routes to IPv6 prefixes that belong to other areas. They are
similar to OSPFv2 type 3 summary LSAs. The interarea-prefix LSA is originated by the
ABR and has an LS type of 0x2003. It is also used to send the default route in stub areas.
These LSAs are flooded within the area only.
Each interarea-router LSA describes a route to a router in another area. It is similar to
OSPF Type 4 summary LSAs. It is originated by the ABR and has an LS type of 0x2004.
These LSAs are flooded within the area only.
Autonomous system-external LSAs describe networks that are external to the au-
tonomous system. These LSAs are originated by ASBRs, have an LS type of 0x4005, and
therefore are flooded to all routers in the autonomous system.
The group-membership LSA describes the directly attached networks that contain mem-
bers of a multicast group. This LSA is limited to the area and has an LS type of 0x2006. This
LSA is described further in RFC 1584. This LSA is not supported in Cisco IOS software.
Ty pe 7 L SAs desc ribe net works that are ex ternal to the autonomous system, but they are
flooded to the NSSA area only. NSSAs are covered in RFC 1587. This LSA is generated by
the NSSA ASBR and has a type of 0x2007.
Link LSAs describe the router's link-local address and a list of IPv6 prefixes associated
with the link. This LSA is flooded to the local link only and has a type of 0x0008.
The intra-area-prefix LSA is a new LSA type that is used to advertise IPv6 prefixes associ-
ated with a router, a stub network, or an associated transit network segment. This LSA
contains information that used to be part of the router LSAs and network LSAs.
