The SL5G rugged 5G mobile router provides an SD-LAN, centrally managed, mobile encrypted cellular data path to new or existing Mesh deployments. Install SL5Gs on mobile vehicles paired with a supported Mesh device to allow a vehicle to roam beyond MESH wireless coverage boundaries, providing a seamless sub-millisecond lossless layer-2 handoff to private or carrier LTE networks. Use multiple SL5G rugged mobile router devices in a fixed or mobile network to enable load balancing and increased overall capacity and data throughput.