IPv6 Configuration Guide K/KA/KB.15.15

Table 17 OSPFv3 LSA types (continued)
Flood scopeUseDescriptionLSA type
AreaDescribes the route to an ASBR in another OSPFv3 normal area
(including the backbone area) of the same AS. (Excludes prefixes
for link-local addresses.)
Propagated through backbone area to other areas. (Excludes
any ASBR in the same area as the router sending the LSA.)
Inter-area-router-LSA0x2004
ASDescribes the route to a destination prefix in another AS (external
route). (Excludes prefixes for link-local addresses.)
Originated by ASBR in normal or backbone areas of an AS and
propagates through backbone area to other normal areas.
AS-external-LSA0x2005
Does not flood over virtual links and is not summarized in virtual
links. For injection into an NSSA, an NSSA ABR generates a
type-7-default-LSA advertising the default route (::/0).
NSSADescribes the route to a destination in another AS (external
route). Originated by ASBR in NSSA. ABR translates type-7 LSAs
to AS-external-LSAs for injection into the backbone area.
Type-7-LSA0x2007
Link-localFor other routers on the same VLAN interface, describes the
router's link-local address and any other IPv6 prefixes reachable
on the VLAN. Link LSAs are not flooded over virtual links.
Link-LSA0x2008
AreaGenerated on transit links within an area by the DR operating
on those links. Also, every OSPFv3 router generates this LSA to
refer to stub and loopback prefixes on the router.
Intra-area-prefix-LSA0x2009
OSPFv3 router types
Interior routers
This type of OSPFv3 router belongs to only one area. Interior routers flood router-LSAs to all routers
in the same area and maintain identical LSDBs. In Figure 23 (page 249), routers R1, R3, R4, and
R6 are all interior routers because they link to other routers in the same area.
Figure 23 Example of interior routers
R1
R2
R
5
R3
R4
R6
Area 0 (Backbone)
Area 1
A
r
e
a
2
Interior Routers
Interior Router
Area border routers (ABRs)
This type of OSPFv3 router has membership in multiple areas. ABRs are used to connect the various
areas in an AS to the backbone area for that AS. Multiple ABRs can be used to connect a given
area to the backbone, and a given ABR can belong to multiple areas other than the backbone.
OSPFv3 router types 249