Description
This article describes how to configure the health check for SD-WAN links with high latency.
Solution
With the default settings, the performance SLA will show a link with latency higher than 500 ms as down:
# diagnose sys sdwan health-checkBy default, the probe-timeout has the value of 500 ms, therefore if the link has a higher latency the probe will fail.
Health Check:
Seq(1 port1): state(dead), packet-loss(100.000%) sla_map=0x0
# config system virtual-wan-linkFortiOS 6.4, 7.0 and 7.2.
# config health-check
edit <name>
set probe-timeout 2000
# conf system sdwanResult.
# config health-check
edit <name>
set probe-timeout 2000
set probe-timeout <----- Time to wait before a probe packet is considered lost (500 - 3600000 msec, default = 500).
# diagnose sys sdwan health-check
Health Check
Seq(1 port1): state(alive), packet-loss(0.000%) latency(941.158), jitter(27.486) sla_map=0x0
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