OSPFv3 LSA Types
Most LSA functionality in OSPFv3 is the same as that in OSPFv2, with a few changes in the LSA
names. In addition, OSPFv3 has two additional LSA types. Table 20-5 briefly describes each of
the LSA types in OSPFv3. Compare this table to Table 9-4 for a better perspective on how OSPFv2
and OSPFv3 LSA types are similar to and different from each other. Note that OSPFv3 LSA types
are basically the same as OSPFv2 LSAs, except for their slightly different names and the additions
of type 8 and 9 LSAs to OSPFv3.
Table 20-5 OSPFv3 LSA types
LSA
Type Common Name Description
Flooding
Scope
1 Router LSA Describes a router’s link states and costs of its links to one area. Area
2 Network LSA Generated by a DR to describe the aggregated link state and costs
for all routers attached to an area.
Area
3 Inter-Area Prefix LSA
for ABRs
Originated by ABRs to describe interarea networks to routers in
other areas.
Area
4 Inter-Area Router LSA
for ASBRs
Originated by ASBRs to advertise the ASBR location. Area
5 Autonomous System
External LSA
Originated by an ASBR to describe networks learned from other
protocols (redistributed routes).
Autonomous
System
8 Link LSA Advertises link-local address and prefix(es) of a router to all other
routers on the link, as well as option information. Sent only if
more than one router is present on a link.
Link
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.
Area