Configure Overlay Routing

Redistribution rules allow you to enable advertising of routing information from the connected, static, 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)., and BGP Border Gateway Protocol. BGP is a routing protocol for exchanging data and information between different host gateways or autonomous systems on the Internet. interfaces into overlay routing. The Routing information from other sources is not automatically redistributed into overlay routing, but need to be configured for each source protocol locally on each Gateway.

To redistribute routes as overlay routes, 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 Overlay Routing tab, click the + icon on the Redistribution rules table.

6. From the Source Protocol drop-down list, select the type of routes to redistribute. The following options are available:
   • 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. If you have selected Connected, select the 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. interfaces to which the Gateway is connected.
   • OSPF—To redistribute routes learnt from the OSPF neighbors. If you have selected OSPF, select the OSPF path type from Filter column. The following options are available:
     • Intra Area—To redistribute routes to same area from which they originated.
     • Inter Area—To redistribute routes to another area in the OSPF domain.
     • External Type 1—To redistribute as routes as External type 1 which applies both external cost to the destination and the cost to reach the boundary router in an Autonomous System Also referred to as AS. An autonomous system is a single network or a collection of networks that is under a single administrative control. The routing devices in an Autonomous System generally use a single interior gateway protocol (IGP) for routing information. Routing between two Autonomous Systems is handled by the Exterior Gateway Protocols like BGP..
     • External Type 2—To redistribute routes as External type 2 and apply only the external cost to the destination.
   • BGP—To redistribute routes using BGP.
7. Set a filter for the selected protocol.
8. Associate an existing Route map with the Source Protocol if required.

   The route map association is applicable only for available routes.

9. Click Next to view a summary of the configuration.
10. Click Finish to complete the VPNC settings.

    The Finish button is disabled if there are any errors in the configuration. Resolve the errors to save your configurations.

The following GIF illustrates the workflow: