Network Monitoring
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Definition
Network monitoring is the continuous, automated observation of a client's network infrastructure – firewalls, switches, access points, internet circuits, and the devices attached to them – for availability, performance, configuration changes, and unexpected traffic. It's typically done with SNMP polling, flow data (NetFlow or sFlow), syslog, and periodic discovery scans, through a module of the RMM or a dedicated network tool.
Why it matters to an MSP
An endpoint agent only sees the machine it's installed on. Network monitoring is how you see everything else: the flapping switch port, the firewall pinned at 95% CPU, and the devices and traffic nobody told you about. Discovery scans surface the unmanaged laptop and the printer with default credentials; flow data shows which SaaS and cloud services the client's staff actually use. It's one of the fastest ways to build a shadow IT inventory and a strong network assessment artifact.
The operational payoff is fewer and shorter tickets. Without it, you learn the network is down when the client calls, and the first 30 minutes of a P1 go to working out whether the fault is the ISP, the firewall, or a switch. With it, the ticket opens with the cause already narrowed. Alert tuning is the discipline: an unfiltered SNMP feed generates hundreds of noise alerts a week, so start with a short list of actionable conditions – device down, WAN down, interface errors, bandwidth saturation, configuration change. Network devices bill at roughly $25–$75 per device per month on most rate cards, and a client who has lived through an unexplained outage rarely argues. Firewalls and switches you can't see are also ones you can't patch, which makes this a prerequisite for vulnerability management on infrastructure, not only endpoints.