A waiting period is required for the guest to boot and guest services to be available. The defined guest action is not executed until this period has expired. Probing may begin earlier if multiple guest actions with different waits are configured on a probe. Only one probe can take action on a guest. The startup wait must be long enough to allow the guest to come up in normal operation and the waiting period ranges from 1 to 30 minutes. The default waiting period is 5 minutes.