Creating an OSPF area

You can create an OSPF area in a CPE template or on a device. When you create an OSPF area in a CPE template, the OSPF area is automatically created on all devices that are using the template.

To create an OSPF area:

1. Create an OSPF area in one of the following ways:
   • If you want to create an OSPF area in a CPE template, go to the SD-WAN → CPE templates menu section, click the template and in the displayed settings area, select the OSPF → OSPF areas tab.
   • If you want to create an OSPF area on a CPE device, go to the SD-WAN → CPE menu section, click the device, and in the displayed settings area, select the OSPF → OSPF areas tab and select the Override check box.

   A table of OSPF areas is displayed.

2. Click + OSPF area.
3. This opens a window; in that window, in the OSPF area field, enter the OSPF area ID as an IPv4 address or an integer number.
4. If you want to make the OSPF area a stub area:
   1. Select the Stub check box. This check box is cleared by default.
   2. In the Area type drop-down list, select a stub area type:
      • Stub
      • Stub NO-SUMMARY
      • NSSA
      • NSSA NO-SUMMARY
   3. If the Area type drop-down list, you selectedNSSA or NSSA NO-SUMMARY, if you need to prevent the advertisement of the 0.0.0.0/0 default route to the NSSA area, select the NSSA suppress FA check box. This check box is cleared by default.
   4. In the Default cost field, enter a metric for the default route or for summary routes. Range of values: 0 to 16,777,215.
5. If you want to use the shortcut method for SPF calculations, select the Shortcut check box. This check box is cleared by default.
6. In the Authentication drop-down list, select the OSPF authentication method:
   • Message digest to use the MD5 algorithm.
   • Simple password to use an unencrypted password. This authentication method is less secure than MD5 algorithm, however, it can provide authentication when used in a trusted network environment.
7. If you want to specify OSPF ranges:
   1. Under OSPF ranges, click + Range.
   2. In the Range field, enter the IPv4 prefix of the routes.
   3. In the Action drop-down list, select the action to perform with routes:
      • Advertise if you want to advertise routes over the OSPF protocol. Default value.
      • Not announce if you do not want to advertise routes over the OSPF protocol.
      • Substitute to replace the IPv4 prefix of the routes with the specified IPv4 prefix, and then advertise these over the OSPF protocol. If you select this value, in the Substitute field, enter the IPv4 prefix.
   4. If in the Action drop-down list, you selected Advertise or Substitute, in the Cost field, enter a metric for routes. Range of values: 0 to 16,777,215.

   The OSPF range is specified and displayed under OSPF ranges. You can specify multiple OSPF ranges; to delete a range, click the delete icon next to it.

8. If you want to connect the OSPF area to another area through a transit area, specify a virtual link:
   1. Under Virtual links, click + Virtual link.
   2. In the Address field, enter the IPv4 address of the network interface of the router in the transit area.

   The virtual link is specified and displayed under OSPF ranges. You can specify multiple virtual links; to delete a link, click the delete icon next to it.

9. If you want to configure route filtering for the OSPF area, under Filtering, do the following:
   1. Select previously created access control lists:
      1. In the Export list drop-down list, select an access control list for routes that are advertised from the OSPF area to other areas.
      2. In the Import list drop-down list, select an access control list for routes that are advertised from other OSPF area to the given area.
   2. Select previously created prefix lists:
      1. In the Outbound filter list drop-down list, select a prefix list for routes that are advertised from the OSPF area to other areas.
      2. In the Inbound filter list drop-down list, select a prefix list for routes that are advertised from other OSPF area to the given area.
10. Click Save.

    The OSPF area is created and displayed in the table.

11. In the upper part of the settings area, click Save to save the settings of the CPE template or device.