The WAN Overlay settings enables you to add or modify a User-Defined WAN Overlay. You can also modify or delete an existing auto-detected WAN Overlay that has been detected on a routed interface.

To configure WAN Overlay settings for an Edge:

  1. In the Enterprise portal, click the Open New Orchestrator UI option available at the top of the Window.
  2. Click Launch New Orchestrator UI in the pop-up window.
  3. The UI opens in a new tab displaying the monitoring and configuring options.

In the New Orchestrator UI, click the Configure tab.

To configure Interface settings for a specific Edge:

  1. Click Configure > Edges.
  2. The Edges page displays the existing Edges.
  3. Click the link to an Edge or click the View link in the Device column of the Edge.
  4. The configuration options for the selected Edge are displayed in the Device tab.
  5. In the Connectivity category, click Interfaces.
  6. The WAN Overlay Settings section displays the existing Overlay. You can click the Name of the Overlay to modify the settings. To create a new WAN overlay, click Add User Defined WAN Overlay.

  7. For more information on configuring the various settings for public and private overlay, see Configure Edge WAN Overlay Settings. In addition to these settings, you can configure the following with the new Orchestrator UI:
    • Address Type – Choose the WAN overlay link to use either IPv4 or IPv6 address. You can also select IPv4 and IPv6, which enables to configure both IPv4 and IPv6 user-defined overlay towards the same ISP as a single link. This option helps preventing oversubscription of a link towards an ISP.
    • Optional Configuration – Allows to configure the following settings:
      • IPv4 Source Address
      • IPv4 Next-Hop Address
      • IPv6 Source Address
      • IPv6 Next-Hop Address
      • Custom VLAN
      • Custom VLAN ID
      • Enable Per Link DSCP
      • DSCP tag (See the "Support for DSCP Value Tag Per User Defined Overlay" section below).
  8. Click Add/Update Link to save the configuration.

Support for DSCP Value Tag Per User Defined Overlay

With the 5.0.0 release, network administrators will have the ability to add a DSCP tag to a specific overlay link. The DSCP tag would be applied at the outer header of the VCMP packet going over the overlay link, and will leverage the private network underlay DSCP tag to treat each overlay uniquely via the QoS setting defined on the WAN underlay network.

System Property for the DSCP Value Tag Per User Defined Overlay

To enable the Enable Device Settings feature, Operators must set the following System Property to true, session.options.showConfigurationInNewUI in the classic SD-WAN Orchestrator, and then login to the new Orchestrator UI.

Enable Per link DSCP Checkbox

Select this checkbox to add a DSCP tag to a specific overlay link. The DSCP tag will be applied at the outer header of the VCMP packet going over this overlay link. This will provide the ability to leverage the private network underlay DSCP tag mechanism to treat each overlay uniquely via QoS setting defined at the upstream router. See the use case for this checkbox in the section below titled, "Use Case: DSCP Value Per User Defined Overlay."

Use Case: DSCP Value Per User Defined Overlay

In this use case, the requirement is to apply the WAN overlay DSCP tag value configured on the WAN link to all traffic egressing from this link, for the tunnel originating Edge. The configured DSCP value should apply to the VCMP outer header so that the MPLS network can read the DSCP value and apply differentiated services to the VCMP encapsulated packet. The inner DSCP tag value, coming from the LAN side of the edge network, should be kept unmodified. Requirements on the tunnel destination side: The hub or peer edge that is receiving the tunnel creation request must respond with the same DSCP overlay tag value sent by the tunnel originator on the VCMP outer header. The hub or peer edge terminating the overlay tunnel should not modify the inner DSCP tag destined for the LAN.

In the image below, the Enterprise is using DSCP values on their underlay network to provide differentiated services based on source WAN overlay link/tunnel.