This Support-KB describes how to configure TVI-Based WAN interfaces in Concerto. The below was testing on Concerto 11.4.1.

Description

TVI-based WAN interface is a tunnel virtual interface which can be used when two or more physical interfaces are attached to the same transport virtual router. It manages two or more physical interfaces as a single WAN interface in the SD-WAN overlay network.

Benefits

Bandwidth optimization : The number of SLA paths to remote appliances does not increase with the number of physical local interfaces on the same transport network.

Limitations

1. TVI-based WAN interfaces support only static IP addressing. TVI based interfaces do not support DHCP. 
2. They also do not support QoS.

Configuration

1. Configure WAN TVI logical interface
2. Map the WAN TVI logical interface to two or more VNI physical ports

WAN TVI logical interface:

A new sub-category is added. IP address is assigned to TVI interface.

Map WAN TVI logical interface to VNI interfaces:

A new category called VNI For WAN TVI is added and is associated with vni-0/0 here for example.

The same can be use to add VNI-WAN-2 associated with vni-0/3.

Below is the configuration output of TVI-WAN based interfaces :

Verification

1. All 03 TVI-WAN Based interfaces are up
   1. Device with WAN TVI-Based Interface

                 b. Remote branch device with normal WAN VNI Interfaces

       2. SLA Probes are exchanged only on tvi-wan interface instead of both vni wan interfaces

        3. Data path and control are up with remote branch and Controller.

       4. Routing:

       Concerto installs two default routes in routing instance Internet-Transport-VR.

       In production environment WAN TVI IP address should be routable in Internet.

       It can be either a public IP address or Natted behind underlay Internet gateway.

If you have any more questions or need further clarification, please email support@versa-networks.com.