False positive - icmp

[garysteers]

Hi @guillaume-minesales

Not sure if this is fixed already, referencing this post:

ICMP Alerts

Would I be right in assuming that you have distributed pollers for that amount of hosts, or are you running a single server? If you have distrigubted pollers then you need to add the -g option to the ping, i.e. * * * * * librenms /opt/librenms/ping.php -g POLLERGROUPNO >> /dev/null 2>&1 If you only have one poller than it may be down to high load on the lnms server.

That may be the cause for it, if you have every poller trying to ping every device it will cause these false positives. I have come accross this a few times with different installs so I worked with others to update the docs here:

Fast Ping Checking - LibreNMS Docs

NOTE : If you are using distributed pollers you can restrict a poller to a group by appending -g to the cron entry. Alternatively, you should only run ping.php on a single node.

This should fix the issue if you still see it.