Configuring OSPF

The OSPF Open Shortest Path First. OSPF is a link-state routing protocol for IP networks. It uses a link-state routing algorithm and falls into the group of interior routing protocols that operates within a single Autonomous System (AS). configuration allows advertising branch networks into an OSPF area and also enables VPNCs to learn corporate routes. You can configure the General, Interface and Redistribution settings in this section.

To configure OSPF, complete the following steps:

1. In the WebUI, set the filter to Global or a group that contains at least one Branch Gateway that is configured as an AOS-10VPNC.
2. Under Manage, click Devices > Gateways.
   A list of gateways is displayed in the List view.
3. Click a gateway under Device Name.
   The dashboard context for the gateway device is displayed.
4. Under Manage, click Device.
   The gateway configuration page is displayed.
   If you are accessing the VPNC configuration page for the first time, the Guided Setup wizard opens automatically. Otherwise, click the Guided Setup.
5. In the OSPF tab, click the General accordion.
6. Slide the Enable OSPF toggle switch.
7. Select the Default originate check box to generate a default external route to OSPF.
8. Enter the Router ID.

The router ID is the IPv4 address used for identifying it as the router in an autonomous system.

9. Set the OSPF Area ID for the interface VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN..
10. Click the Interface accordion.
11. To add an interface, click the + icon in the VLANs table.
12. Select an OSPF interface VLAN from the drop-down list.
13. Set the OSPF Area ID for the interface VLAN.
14. Set the Cost for the interface VLAN.
15. Set the Hello Interval timer to send messages to neighbors.
16. Click the Redistribution accordion to display the Redistribution Rules table.
17. To add redistribution rules, click the + icon on the Redistribution Rules table.
18. From the Source Protocol drop-down list, select one of the following type of routes to redistribute:
    • Static—To redistribute IP static routes.
    • Connected—To redistribute routes received from the subnets Subnet is the logical division of an IP network. that are directly connected to a router’s interface at the hub site.
    • SDWAN Overlay—To redistribute routes learnt from the SD-WAN Software-Defined Wide Area Network. SD-WAN is an application for applying SDN technology to WAN connections that connect enterprise networks across disparate geographical locations. overlay network through the Overlay Agent Protocol.
    • IAP-VPN Overlay—To redistribute routes that were received from deployments with Instant APs.
19. Set the Filter for the list of VLANs to be redistributed into OSPF.

This is applied only when you select Connected in the Source Protocol drop-down list.

20. Select the Route type if the route is redistributed as E1 (External-type 1) or E2 (External-type 2).

If you want to steer to the closest exit use E1, to steer the traffic to a specific exit use E2.

• E1 increases the cost, reflecting the in the internal OSPF domain path cost.
• E2 has a fixed cost as configured in the Cost field.
21. Select a Route Map to associate with the routes.
22. Allocate the initial Cost for the route.
23. Click Next to configure BGP Border Gateway Protocol. BGP is a routing protocol for exchanging data and information between different host gateways or autonomous systems on the Internet. .

The following GIF illustrates the workflow: