kemp_loadmaster_grafana_dashboard.jpg
You need to have metrics scraped from the Kemp Loadmaster instance using snmp_exporter and have them ready in Prometheus. You need to scrape twice. Once with the "common" module and once with a custom module. I've written a blog post on how to do this:
https://onpremisys.nl/2020/01/06/monitoring-kemp-loadmaster-using-snmp-and-prometheus