NPM can monitor a wide range of network devices and infrastructure, including routers, switches, firewalls, servers, and virtual machines. However, some devices may not support standard protocols such as SNMP or WMI, or may have specific metrics that are not monitored out-of-the box by NPM. In such cases, you can extend NPM’s monitoring to non-standard devices by using object identifiers (OIDs) organized in management information bases (MIBs). OIDs are numeric strings that uniquely identify a variable in a MIB. MIBs are hierarchical databases that define the properties and values of the variables that can be monitored on a device. By importing device-specific MIBs into the SolarWinds MIB Database, and creating custom pollers based on OIDs from the MIBs, you can monitor any metric that is available on the device. You can also display the polled data in the web console using dedicated or existing resources12. References:

Create custom monitors in NPM - SolarWinds

SCP Study Aid - SolarWinds (page 10)