SD-WAN improvements

6.4.8 Build 1823 includes a number of improvements and bug fixes related to SD-WAN comparability with session-aware load balancing clustering (SLBC).

The primary FPC or FPM performs health checking and synchronizes SD-WAN routing decisions to the other FPCs or FPMs. In an FGCP HA cluster, the SD-WAN routing decisions are synchronized from the primary FPC or FPM of the primary FortiGate to the FPCs or FPMs in the secondary FortiGate.

The FortiGate-6000 and 7000 now support weight-based and volume-based SD-WAN load-balancing methods:

config system virtual-wan-link

set load-balance-mode {weight-based | measured-volume-based}

end