12 OSPF extensions

<Structure of this chapter>

• 12.1 Description of area and area division function

• 12.2 Area configuration

• 12.3 Description of neighboring router authentication

• 12.4 Configuration for neighboring router authentication

• 12.5 Description of graceful restart

• 12.6 Graceful restart configuration

• 12.7 Description of stub routers

• 12.8 Stub router configuration

• 12.9 Operation of OSPF extensions