Edge WAN settings enable you to add or modify the user-defined WAN Overlay network. You can also modify the auto-detected WAN Overlay settings. You can assign the configured WAN interfaces to a WAN link.

In the Enterprise portal, navigate to Configure > Edges.

Either click the Device Icon next to an Edge or click the link to the Edge and click the Device tab.

You can configure the WAN overlay properties in the WAN Settings.

For the auto-detected WAN Overlay networks, click the Edit option to modify the settings.

For the user-defined WAN Overlay networks, click Add User Defined WAN Overlay to create new Overlay settings or click Edit for an existing network to modify the settings.

Table 1. WAN Overlay Settings
Option Description
Link Type (Available only for user-defined Overlay) You can deploy the WAN Overlay as a public or private link. Choose the relevant link type from the drop-down.
Name Enter a descriptive name for the public or private link
SD-WAN Service Reachable (Available only for user-defined Overlay and a Private link)

VeloCloud supports private WAN deployments with a hosted VeloCloud service for customers with hybrid environments who deploy in sites with only a private WAN link.

In a site with no public overlays, the private WAN can be used as the primary means of communication with the VeloCloud service, by enabling the SD-WAN Service Reachable option.

When you select the checkbox, the list of public SD-WAN IP addresses is displayed, which would be advertised across the private network to allow the operation without public WAN overlays.
Public IP Address Displays the IP address learned from the Interface associated with the WAN Overlay being edited or created.
Pre-Notification Alerts Select the checkbox to enable pre-notification alerts. Ensure that you have enabled the Link alerts in the Configure > Alerts & Notifications screen to receive the alerts.
Alerts Select the checkbox to enable alerts. Ensure that you have enabled the Link alerts in the Configure > Alerts & Notifications screen to receive the alerts.
Interfaces

Select one or more routed interfaces from the update selection drop-down. The list consists of Routed Interfaces with the WAN Overlay set to User Defined Overlay.

This option binds the current user-defined overlay with the routed interface that you select.

Note: The update selection option is available only for user-defined WAN Overlay.
Source IP Address (Available only for user-defined Overlay)

Enter the IP address of the routed interface.

This is the raw socket source IP address used for VCMP tunnel packets that originate from the Interface selected in the Interfaces drop-down, to which the User Defined Overlay is bounded.

Source IP address does not have to be pre-configured anywhere but must be routable to and from the Interface this User Defined Overlay is bounded.

Next-Hop IP Address (Available only for user-defined Overlay) Enter the next hop IP address to which the packets, which come from the raw socket source IP address specified in the Source IP Address field, should be routed.
Custom VLAN (Available only for user-defined Overlay)

Select the checkbox to enable custom VLAN and enter the VLAN ID. The range is 2 to 4094.

This option applies the VLAN tag to the packets originated from the Source IP Address of a VCMP tunnel from the interface selected in the Interfaces drop-down.
802.1P Setting (Available only for user-defined Overlay)

To configure the 802.1P setting, the System Property session.options.enable8021PConfiguration must be set to True. By default, this value is False.

If this option is not available for you, contact your Operator to enable the setting.

You can select this checkbox, only when you have already selected the Custom VLAN checkbox. Select the checkbox to enable the 802.1P setting and enter the priority value as a 3-digit binary number. The range is from 000 to 111 and default is 000.

Click Advanced to configure the following settings:

Option Description
Bandwidth Measurement Choose a method to measure the bandwidth from the following options:
  • Measure Bandwidth (Slow Start): When measuring the default bandwidth reports incorrect results, it may be due to ISP throttling. To overcome this behavior, choose this option for a sustained slow burst of UDP traffic followed by a larger burst.
  • Measure Bandwidth (Burst Mode): Choose this option to perform short bursts of UDP traffic to an SD-WAN Gateway for public links or to the peer for private links, to assess the bandwidth of the link.
  • Do Not Measure (define manually): Choose this option to configure the bandwidth manually. This is recommended for the Hubs.
Upstream Bandwidth Enter the upstream bandwidth in Mbps. This option is available only when you choose Do Not Measure (define manually).
Downstream Bandwidth Enter the downstream bandwidth in Mbps. This option is available only when you choose Do Not Measure (define manually).
Dynamic Bandwidth Adjustment Select the checkbox to track congestion and packet loss in WAN and to adjust the bandwidth as required. It is recommended to enable this option for wireless links.
Use as Backup Only

Select the checkbox to use the Overlay WAN as a backup, when other Overlay networks are down or not available. The Overlay WAN is displayed in the Monitoring page as a backup link. Click Monitor > Edges to view the status of the Edge.

Note: If the Edge is used as a hub or is part of a cluster, then do not choose this option.
MTU Enter a value for the maximum transmission unit (MTU). The range is 576 to 1500 bytes.
Note: It is recommended to use the MTU size from 1300 bytes and above. The optimum size is 1500 bytes.
Overhead Bytes

Enter a value for the Overhead bandwidth in bytes. This is an option to indicate the additional L2 framing overhead that exists in the WAN path.

When you configure the Overhead Bytes, the bytes are additionally accounted for by the QoS schedular for each packet, in addition to the actual packet length. This ensures that the link bandwidth is not oversubscribed due to any upstream L2-framing overhead.
Private Network Name (Available only for user-defined Overlay and a Private link) Choose the private network name from the drop-down list. You can also click New Private Network Name from the list and enter a name for a new network.
UDP Hole Punching (Available only for a Public link) Select the checkbox to enable UDP hole punching for the Overlay network.
Type (Available only for a Public link) Choose whether the link is Wired or Wireless, from the drop-down.
Configure Static SLA (Available only for user-defined Overlay and a Private link) Select the checkbox to configure the static SLA and enter the values for Latency, Jitter, and Loss.
Configure Class of Service (Available only for user-defined Overlay and a Private link) Select the checkbox to configure the class of service and enter appropriate values for the following:
  • Class of Service: Enter a descriptive name for the class of service.
  • DSCP Tags: Click Set to select the DSCP tags to be used in the class of service.
  • Bandwidth: Enter a value for the bandwidth.
  • Policing: Select the checkbox to enable the class-based policing.
  • Default Class: Click to set the corresponding class of service as default.

Click the Plus icon (+) to add more rows and the Minus icon (−) to remove a row. For more information on class of service, see Configure Edge WAN Settings for MPLS Private Links.

Click Update Link to save the settings.