Questions on monitoring and alerting

Help
1

When a device being added to LibreNMS server

  • Is it configurable to customize what to monitor and what not? E.g., may I filter out some interfaces that are shutdown?
  • Is it configurable to attach user MIBs to a device?
  • May I define different level of threshold for a check? E.g., minor alarm on CPU util > 80 %, and major alarm on CPU util > 95%?
  • May I define different thresholds for different groups of devices?

Thanks and regards.

2

Yes - under settings - port settings.

No, LibreNMS is not MIB based monitoring.

Yes see docs about alerting. Home - LibreNMS Docs

You could probably do that with alert rules and set up rule mapping to device groups. Again see the docs.

3

Thanks very much Kevin!

I am new to the tool and was wondering how the metrics to be monitored are configured for a device.
As per your reply, it is configurable on what to monitor and what not. Is it configurable per device, per group of devices? where can I find the configurations?

LibreNMS is not MIB based, how the metrics are defined?

Thanks and regards.

4

This all coded per device OS definitions into yaml file.

https://docs.librenms.org/#Developing/Support-New-OS/

Also if you want to check out the demo

https://demo.librenms.org