To add a router to an OSPF area

Steps
 

In the navigation tree OSPF view, expand Network→Routing→OSPF Area.


Right-click on the OSPF area icon and choose Add OSPF Instance. The Area Site (Create) form opens.


Configure the required parameters.

Configure the area as a blackhole range to avoid routing loops.


Select a Routing Instance in the Routing Instance panel.


Depending on the Type parameter value from Step 3 , the Stub/NSSA tab is configurable. Click on the Stub/NSSA tab and configure the required parameters.

The Default Cost parameter is configurable only when the Type parameter value from Step 3 is Stub (No Type 5 External) or Totally Stub (No Summaries).

The Redistribute External Routes, Originate Default Route, and Adjacency Check parameters are configurable only when the Type parameter value from Step 3 is NSSA (No Type 5 External) or NSSA (No Summaries).

The Adjacency Check parameter is configurable only when the Originate Default Route is set to Originate Type 3 or Originate Type 7. Enable the Adjacency Check parameter to enforce an ABR to have an adjacency in area 0 before the default route or routes can be advertised into the NSSA.


Save your changes and close the form. An icon for the router appears in the navigation tree under the OSPF Area icon.

End of steps