Types of ospf routing devices – HP 445946-001 User Manual
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OSPF
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Figure 17
OSPF area types
Types of OSPF routing devices
As shown in the figure, OSPF uses the following types of routing devices:
•
Internal Router (IR)—a router that has all of its interfaces within the same area. IRs maintain LSDBs
identical to those of other routing devices within the local area.
•
Area Border Router (ABR)—a router that has interfaces in multiple areas. ABRs maintain one LSDB
for each connected area and disseminate routing information between areas.
•
Autonomous System Boundary Router (ASBR)—a router that acts as a gateway between the OSPF
domain and non-OSPF domains, such as RIP, BGP, and static routes.
Figure 18
OSPF domain and an autonomous system
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