Multi-Service Shared Bearer Overview

Starting from Release 5.1.0, Contrail Service Orchestration (CSO) supports the provisioning of more than one service on the same physical (bearer) interface for WAN links associated with on-premise SD-WAN spoke sites. In previous releases, each WAN link had to be configured as a separate physical interface. However, from Release 5.1.0, WAN links can be configured as logical interfaces. thereby enabling the same physical interface to carry Internet and MPLS traffic on the interface with VLAN separation. The shared bearer (physical interface) supports both full-mesh and hub-and-spoke topologies.

When the same physical interface is used for multiple WAN links:

To enable the configuration of WAN links as logical interfaces in on-premise SD-WAN spoke sites, the SP Administrator user must modify the device template and configure the WAN ports as logical interfaces. See Configuring Template Settings in a Device Template.

Table 77: Support for VLAN Tagging for Single and Dual CPE Devices

 

Type of CPE

VLAN Tag

Unique Physical Interface for each WAN link

Same Physical Interface for more than one WAN link

Single CPE

Untagged

Supported

Supported. However, only one WAN link can be untagged.

Single CPE

Tagged

Supported

Supported

Dual CPE

Untagged

Supported

Not supported

Dual CPE

Tagged

Supported

Supported