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.
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 cisco-grafana-snmp
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