Quick Answer

The correct order ends with enabling the reaction via the ip sla reaction trigger command, as this final step activates the threshold-based action after all prior configuration is complete. This sequence is necessary because IP SLA first requires a defined operation, such as an ICMP echo or UDP jitter test, to establish a baseline; then you configure the rising and falling threshold values that define acceptable performance boundaries. After that, the ip sla reaction command sets the specific trigger event—like when the measured metric exceeds the rising threshold or falls below the falling threshold—and only then can you schedule the operation with ip sla schedule. Finally, the ip sla reaction trigger command must be enabled to actually execute the action, such as sending an SNMP trap or logging an event. On the ENCOR 350-401 exam, this drag-and-drop task tests your understanding of the logical dependency chain: you cannot enable a trigger before defining what to trigger on. A common trap is placing the enable step before scheduling, but the scheduler must be running for the reaction to fire. Memory tip: think “Define, Threshold, Reaction, Schedule, Enable”—like a D-T-R-S-E checklist.