Technical Tip: Maximize SLA Bandwidth (Load Balancing) in version 7.4.1 and above (SD-WAN rule Strategy)

[ekrishnan]

Description	This article describes the feature change of SD-WAN Load Balancing in version 7.4.1 and above compared to the previous versions.
Scope	FortiGate.
Solution	In previous versions, the load balancing on SD-WAN rules was done only by the MAXIMIZE SLA BANDWIDTH strategy, but this feature is now enhanced, and to be specific, it was removed and added as a part of MANUAL and LOWEST COST (SLA). In previous versions (version 7.2.6 has been taken as an example here): On GUI: On version 7.4.1: After selecting 'manual' or 'sla', the 'load-balance' will appear and can be enabled. On GUI: On new versions, Load balancing can be done by both MANUAL MODE and LOWEST COST SLA MODE. The load balancing toggle button should be enabled as per above. In manual MODE, when Load balancing is enabled, it will not check for the SLA targets (does not depend on SLA targets). On the LOWEST COST SLA MODE, when load balancing is enabled, it will check the SLA targets configured. SD-WAN will then choose all of the links that satisfy the SLA target to forward traffic based on a load-balancing algorithm. For more details and configurations on this selection, review the Fortinet Administration Guide for v7.4.1 on SD-WAN load balancing: Configuring the SD-WAN interface