When to use: Use when sizing a BACnet /IP network segment. Estimate the polling traffic from a controller or supervisor reading points across many devices. Each poll is a ReadProperty request + response (2 packets), and every BACnet/IP packet carries roughly 50 bytes of BVLC/UDP/IP/Ethernet overhead on top of the APDU. The tool reports bandwidth, link utilisation on 100 Mbps and 10 Mbps links, and the smallest IPv4 subnet that fits your device count plus the BBMD/router.