To create an OSPF area

Steps
 
1 

In the navigation tree OSPF view, right-click on the Network icon and choose Create Area. The Area (Create) form opens.

2 

Configure the required general parameters and click Apply. The form refreshes with additional tabs.

3 

Click on the Area Site tab and click Create to add a routing instance to the area. The Area Site (Create) form opens.

4 

Click Select to choose a routing instance.

5 

Configure the required parameters and click Apply. Additional configurable tabs appear, and an icon for the new area appears in the navigation tree.

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

The Type parameter is not configurable for a backbone-area routing instance.

6 

Depending on the Type parameter value, the Stub/NSSA tab is configurable. Configure stub or NSSA functionality, if required.

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

  1. Click on the Stub/NSSA tab.

  2. Configure the required parameters.

    The Redistribute External Routes, Originate Default Route, and Adjacency Check parameters are configurable only when the Type parameter value from Step 5 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.

7 

Click on the Import Policies and Export Policies tabs and configure the required parameters. Routing policies determine the routes that are advertised to peers, and are created as routing policy statements. See To configure a routing policy statement .

8 

If the area is a backbone area that requires links to remote areas that do not advertise OSPF topology, configure a virtual link.

Perform the following steps:

  1. Click on the Virtual Link tab.

  2. Perform Step 4 to Step 7 of To create a virtual link between OSPF areas .

  3. Save your changes. The new virtual link entry appears in the list.

9 

Create an area range:

Perform the following steps:

  1. Click on the Area Range tab and click Create. The Area Range (Create) form opens.

  2. Perform Step 3 and Step 4 of To create an OSPF area range .

  3. Save your changes. The new area range entry appears in the list.

10 

Save your changes and close the form.

End of steps