Configuring BGP

To support interoperability with an existing network infrastructure, BGP Border Gateway Protocol. BGP is a routing protocol for exchanging data and information between different host gateways or autonomous systems on the Internet. a dynamic routing protocol enables AOS-10 VPNCs to redistribute overlay routes learned from Branch Gateways into BGP and advertise those routes in the data center network.

To configure BGP, 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-10 VPNC.
  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 BGP tab, click the General accordion.
  6. Slide the Enable BGP toggle switch to enable BGP.
  7. Select the Default originate check box to generate a default external route to 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)..
  8. Enter the AS number to determine if the BGP neighbor is in the same autonomous system (AS Autonomous System 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.).
  9. Enter the Router ID.
    The router ID is the IPv4 address of Gateway used for identifying it as the router in an autonomous system.
  10. Click the Neighbors accordion.
  11. To add neighbors, click the + icon on the Neighbors table.
  12. Enter the Peer Address (IP address) of the neighbor you want to establish communication with.
  13. Enter the number of the Remote AS to which the peer router belongs.
  14. Select the Multi-Hop check box if you want the gateway to route packets to its remote BGP peer that is more than one hop away.
  15. Use the Update Source field to set the Interface or IP address used for the BGP updates in a multi-hop scenario.
  16. Select the Route map IN value from the drop-down list.
    This is a per-neighbor routing policy that is applied to information received from the neighbor.
  17. Use the Route Map Out field to select the value from the drop-down list.
    This is a per-neighbor routing policy that is applied to information sent to the neighbor.
  18. Click the Networks To Advertise accordion.
  19. To add networks, click the + icon on the Prefixes to Aggregate table.
  20. Select the prefix type as Network or Aggregate from the Type drop-down list.
  21. Enter the network IP Address that you want advertised.
  22. Enter the subnet Subnet is the logical division of an IP network. Mask for the advertised network.
  23. If you select Aggregate from the Type drop-down list, then select the Route Map from the drop-down list.
  24. Click the Redistribution accordion.
  25. To add rules, click the + icon on the Redistribution Rules table.
  26. From the Source Protocol drop-down list, select the type of routes to redistribute.

    The following options are available:

  27. Optionally, you can select a Route map to associate to the routes.
  28. Click Next to configure Overlay Routing.

The following GIF illustrates the workflow: