Most engineers use Prometheus with the SNMP Exporter or Telegraf . These tools "poll" your Cisco hardware using SNMP OIDs.
Grafana cannot pull SNMP data directly from your Cisco switches or routers. You need a middleman to "collect" the data and a database to "store" it. cisco-grafana-snmp
Grafana connects to the database to display real-time metrics like bandwidth, CPU usage, and interface status. Key Benefits Monitor SNMP devices with Grafana, Telegraf and InfluxDB Most engineers use Prometheus with the SNMP Exporter
Prometheus or InfluxDB stores the polled data with a timestamp, allowing you to see trends over hours, days, or months. cisco-grafana-snmp