Performance SLA
Performance SLAs are used to measure the health of links that are connected to SD-WAN member interfaces by either sending probing signals through each link to a server, or using session information that is captured by firewall policies (see Passive WAN health measurement for information), and measuring the link quality based on latency, jitter, and packet loss. If a link fails all of the health checks, the routes on that link are removed from the SD-WAN link load balancing group, and traffic is routed through other links. When the link passes SLA, the routes are reestablished. This prevents traffic from being sent to a broken link and getting lost.
The following topics provide instructions on configuring performance SLA:
- Performance SLA overview
- Link health monitor
- Monitoring performance SLA
- Passive WAN health measurement
- Passive health-check measurement by internet service and application
- Mean opinion score calculation and logging in performance SLA health checks
- Embedded SD-WAN SLA information in ICMP probes
- SD-WAN application monitor using FortiMonitor