Nokia IPSO 4.0 Reference Manual page 359

To configure OSPF
1. Complete
2. Click OSPF under Configuration > Routing Configuration in the tree view.
3. Enter the router ID in the Router ID text box.
4. If you want to define additional OSPF areas besides the backbone area:
a. Enter each name in the Add New OSPF Area text field and click Apply.
b. Select an Area Type—Normal, Stub, or NSSA. For more information, see
c. If you select a stub or NSSA area type, configure the additional parameters that appear,
5. (Optional) For each area, you can add one or more address ranges if you want to reduce the
number of routing entries that the area advertises into the backbone.
Note
To prevent a specific prefix from being advertised into the backbone, click the On button
in the Restrict field next to the entry for that prefix.
6. Configure virtual links for any area that does not connect directly to the backbone area, as
described in
7. Configure the OSPF interfaces, as described in
363.
Configuring Virtual Links
You must configure a virtual link for any area that does not connect directly to the backbone
area. You configure the virtual link on both the ABR for the discontiguous area and another
ABR that does connect to the backbone.
The virtual link acts like a point-to-point link. The routing protocol traffic that flows along the
virtual link uses intra-area routing only.
To configure a virtual link
1. Create an area that does not connect directly to the backbone area and configure an interface
to be in that area.
2. In the Add a New Virtual Link text field, enter the router ID of the remote endpoint of the
virtual link.
3. Select the transit area from the drop-down box. This is the area that connects both to the
backbone and to the discontiguous area.
Additional fields appear.
4. Configure the following parameters for the virtual link:
Nokia Network Voyager for IPSO 4.0 Reference Guide
"Ethernet Interfaces"
on page 354.
as described in Table 22
"Configuring Virtual Links"
for the interface and assign an IP address to the interface.
and Table 23.
on page 359.
"To configure an OSPF interface"
"Types of Areas"
on page
359