Limit an alert rule to network devices.
Alerts › rules. Type sits at the top of a new rule. Network device is one tick, next to hypervisor.
Tick network device
Open Alerts › rules and press + rule. Under type, tick network device. Leave the others clear. The chip says every network device in Example Co, and the line says it covers 1 of 6. Branch router is the network device. Accounts server, Reception PC, Lab host, files01 and Spare laptop are not, so they stay off this rule. None ticked still means every type. The address is typed and not added yet.
Add who is told, then read the sentence
Press add contact. The grey sentence reads: tell email ops@example.com when a warning or worse (any kind) opens on 1 machine network device, and again when it resolves. Press add rule when that sentence is the one you want. This shot stops before that. Kinds left empty means every kind. A tag such as site/Branch narrows it to that site. Limit a report to network devices is the same tick on a report.
The same tick on a report is Limit a report to network devices. Backup mobile on a router is Read backup mobile on a router. Servers are Limit an alert rule to servers. A hypervisor is Limit an alert rule to hypervisors. The rest of the rule — kinds, severity, who is told — is Tell someone when a machine needs attention. A path change, whatever the type, is Only tell them when the network path changes.