I suggest changing the display of alerts, because apart from the name (usually the IP address) with more than 500 devices it is difficult to determine which device it is.
One suggestion is adding a location column.
The second (probably easier) is the use of a solution from the alarm history, where after hovering the name, the device name given by the service appears (I attach the dump).
Hi,
Have you tried these settings?
https://docs.librenms.org/Support/Configuration/#webui-settings
$config[‘force_ip_to_sysname’] = false;
When using IP addresses as a hostname you can instead represent the devices on the WebUI by its SNMP sysName resulting in an easier to read overview of your network. This would apply on networks where you don’t have DNS records for most of your devices.
$config[‘force_hostname_to_sysname’] = false;
When using a dynamic DNS hostname or one that does not resolve, this option would allow you to make use of the SNMP sysName instead
