The SLEs in WAN Assurance are:
WAN edge health: percentage of time clients are affected by WAN edges (routers) not passing traffic efficiently
WAN link health: percentage of the time clients are affected by suboptimal WAN link performance
Application health: percentage of the time when monitored applications are not performing well
Overall service: derived from the above
These SLEs include classifiers that are continually updated based on analytics and that help quickly isolate and repair network problems. For example, classifiers for WAN link health could be a physical cabling problem or could be related to ISP reachability.
Other domains (wired and wireless) have their own SLEs and classifiers—for example, a wireless SLE is Successful Connections, with classifiers including authorization or Dynamic Host Configuration Protocol (DHCP) issues, among others.