Automatic strategy
The automatic strategy is a legacy rule that lets you select an outgoing interface based on its performance ranking compared to the other SD-WAN interfaces. This is achieved by applying a performance SLA to rank the interfaces, and then selecting the desired rank.
In this example, you have three SD-WAN interfaces to three different ISPs that all go to the public internet. WAN1 is your highest quality link and should be reserved for business critical traffic. WAN2 and WAN3 are redundant backup links. You noticed one non-critical application is taking up a lot of bandwidth and want to prioritize it to the lowest quality link at any given time.
To configure automatic SD-WAN rules from the CLI:
config system sdwan
config members
edit 1
set interface "wan1"
next
edit 2
set interface "wan2"
next
edit 3
set interface "wan3"
next
end
config health-check
edit "non-critical application"
set server "noncritical.application.com"
set members 1 2 3
config sla
edit 1
set latency-threshold 250
set jitter-threshold 50
set packletloss-threshold 3
next
end
next
end
config service
edit 1
set name "non-critical application"
set mode auto
set quality-link 3
set dst "non-critical-app-address-object"
set health-check "non-critical application"
next
end
end
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