Cost-Based Link Switching
In bandwidth-optimized SD-WAN deployments, CSO chooses the least expensive link to route the traffic when two or more links meet the SLA profile parameters. CSO uses the cost parameter (Cost/Month) that was specified for the WAN link during the site creation to identify the most cost-effective link to route traffic.
If a less-expensive link comes online and meets the specified SLA parameters, the traffic is switched to the less-expensive link.
This is the default behavior for bandwidth-optimized SD-WAN and does not require any user configuration other than the link cost information (Cost/Month) specified while creating a site.
CSO does not consider the link cost factor while making link switch choices in real time-optimized (AppQoE-enabled) networks.
Preference for the least-expensive link enables CSO to optimize the network operations cost.