I am working on replacing an old Zenoss Core deployment with LibreNMS. One difference between Zenoss and LibreNMS is that Zenoss polls every minute. Since we’re used to this, I want to replicate it with LibreNMS.
I followed the directions for 1 minute polling as found here: https://docs.librenms.org/Support/1-Minute-Polling/
As well as I followed the directions for fast ping checking as found here: https://docs.librenms.org/Extensions/Fast-Ping-Check/
It seems to be working for the most part. However, in testing the alert transport (I fake a network outage by temporarily disabling the network’s management VLAN) it appears that it takes 2 minutes for the default rule “Device Down! Due to no ICMP response.” to trigger the alert transport.
I’ve edited the rule and set Delay to 0 as well as set Global Settings > Alerting > General Alert Settings > Tolerance window for cron (m) to 1.
Of course, I’m new to LibreNMS and really don’t know what I’m doing yet, heh. So I’m sure this is something simple. If anyone can point me in the right direction I’d be very very appreciative.