Definition
A FortiGate SD-WAN Performance SLA measures path health using indicators such as latency, jitter and packet loss.
How it works
Health checks probe configured targets. SD-WAN rules can use results and thresholds to select links meeting service requirements.
Real-world example
Voice applications may prefer a low-loss, low-jitter link rather than one with merely higher headline bandwidth.
Limits and best practices
Use realistic thresholds, validate targets and watch for route flapping. SLA probes do not necessarily reflect end-to-end performance of every application.
Technical detail to remember
A link may be reachable while jitter and packet loss still disrupt VoIP. SD-WAN health checks compare latency, jitter and loss against configured thresholds; test path-selection rules when multiple links degrade at once.