https://www.paessler.com/Download_PRTG/30_Day_Trial
AdPRTG monitors the entire network: traffic, speed, uptime, servers, routers, switches, etc. SNMP, packet sniffing, WMI, NetFlow etc. More than 200 predefined sensors. All-in-one.
30 day trial - no limits · Trusted by Fortune 400 · Easy and fast setup · Test it 100% and for free
Service catalog: Network Monitoring, Bandwidth Monitoring, Server Monitoring