load-balance modes, you can specify the number of links that must be up for the rule to take effect.
In this example, ports 1 to 4 each have 10Mbps of bandwidth, and port 5 has 50Mbps. An application requires 35Mbps of bandwidth, so the SD-WAN rule balances the traffic between ports 1 to 4. If one of the links goes down, all of the traffic must be passed to port 5, so the minimum required number of links is 4.
config system sdwan config service edit 1 set mode load-balance set minimum-sla-meet-members 4 set dst <destination> config sla edit <sla> set id <id> next end set priority-members 1 2 3 4 next end end