Lsa Types - HP 7102dl - ProCurve Secure Router Configuration Manual

LSA Type Contains
1—router link • all directly connected
links:
– status
– cost
2—network router ID of all routers in
a broadcast network
3—summary • network or range of
link networks in an area
• cost for the link to the
network(s)
4—summary • link to an ASBR:
network and
– status
ASB link-state
– cost
5—summary • external network or
external links range of external
networks
• cost for the link
• External 1 (E1) routes,
which include
external cost and the
cost to the ASBR
• External 2 (E2) routes,
which only include
external cost

LSA Types

Routers within an area exchange LSAs Type 1 and 2 to synchronize their
databases. Routers can also transmit LSAs Type 3, 4, and 5 between areas
so that they can learn how to route inter-area traffic. Table 15-6 summaries
the different LSA types.
Table 15-6. LSA Types
Originated By
any router
a DR
an ABR
an ABR
an ASBR
IP Routing—Configuring RIP, OSPF, BGP, and PBR
Link State ID Flooded To
router ID all other routers (or
DRs) in the area
DR ID all other routers in the
area
network address • all ABRs
• all internal routers
in transit and stub
areas that do not
include the
advertised network
• except for the
default route LSA,
not sent to internal
routers in total stub
areas
ASBR ID • all ABRs
• all internal routers
in transit areas
• not sent to internal
routers in stub and
total stub areas
external network • all ABRs
address
• all internal routers
in transit areas
• not sent to internal
routers in stub and
total stub areas
Configuring OSPF
Routing
Table Entry
O
O
IA
IA
E1 or E2
15-37