Bigleaf's SD-WAN service includes monitoring traffic to detect packet loss, latency, jitter and throughput in real-time. When an LTE 4G circuit is set to "backup only" mode, our monitoring traffic will use approx. 2G of data per month. For all other modes (Load-Balance, Avoid and Custom), approx. 5G of data per month will be used. For further information about Bigleaf's load-balancing options, visit the Help Center.