Difference between poller and discover modules

Help
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Hello everybody,
I would like to know if I 've understood the difference between poller and discover modules.
I’m testing this software for my thesis. I use it in this way:

  • I run snmp-scan.py in order to see which are the devices connected to my lan
  • I wait for info to be dislayed
    I think that when I run the snmp-scan, I will get info from the discovery modules which are selected, and every 300 seconds I get info from the polling modules.
    Am I right?

Thanks in advance,
Alessandro

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snmp-scan looks for alive hosts in your specified network then calls the addhost.php script to add the host into the database.

After-which your cronjob does the rest

#https://github.com/librenms/librenms/blob/master/librenms.nonroot.cron

So every 5 minutes your system runs discovery on any new devices, and your polling module runs then aswell. When you add a device to LibreNMS i think thats why it takes 5 minutes for all your info to appear.

*/5  *    * * *   librenms    /opt/librenms/discovery.php -h new >> /dev/null 2>&1
*/5  *    * * *   librenms    /opt/librenms/cronic /opt/librenms/poller-wrapper.py 16

and every 6 hours, discovery is run to all devices to check for any new interfaces etc… more info here https://docs.librenms.org/Support/Discovery%20Support/

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