Setup guides / PRTG
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ValidatedTested with 26.3.122.1665 (Community/Raw Edition)
PRTG discovers this device cleanly over SNMP v2c. These steps mirror the exact M2F validation run.
Router (generic-router-v1)
SNMP v2c · 8 interfaces
- SNMP System Uptime
- CPU Load
- SNMP Memory
- 8 x SNMP Traffic
Run high_cpu → CPU reads ~95% → your alert should fire.
Connection
- Host
- snmp-test.bonguides.com
- Port
- 161
- Version
- SNMP v2c
- Community
- generated per device
The community is generated per device and shown only in your lab — treat it as a throwaway secret and do not reuse it. SNMP v2c is cleartext.
1. Create the device
- In the lab, create a Router (generic-router-v1) and copy its Host, Port, SNMP version and Community.
- Host is snmp-test.bonguides.com, port 161, SNMP v2c. The community is generated per device — treat it as a throwaway secret.
- Expect 8 interfaces (GigabitEthernet0/1–8), plus system uptime, CPU and memory over standard MIBs.
2. Configure PRTG
Add the device
Add an SNMP device with address snmp-test.bonguides.com, then set SNMP v2c and the generated community in the device credentials. Run Auto-Discovery.
Expected sensors
Auto-discovery creates SNMP System Uptime, CPU Load, SNMP Memory, and 8 SNMP Traffic sensors (one per interface). Baseline interface 1 reads ~12 Mbit/s (8 in + 4 out).
3. Run the fault scenarios
Trigger these from the device page in the lab, then watch PRTG react. Each has a recovery action that restores the baseline.
- high_cpu — the CPU Load sensor rises to ~95%, then returns to baseline on recovery.
- traffic_spike — interface 1 Traffic jumps to ~1,200 Mbit/s, then falls back over a few poll cycles.
- interface_down — interface 1 Traffic drops to 0 Mbit/s.
- snmp_down — sensors report a timeout / no response, then resume on recovery.
Caveats
- interface_down shows as zero throughput on the Traffic sensor rather than the sensor itself turning Down — that is normal PRTG traffic-sensor behaviour.
- PRTG's default discovery does not create a standalone sysName sensor; it reads the system group for uptime and names interfaces from ifDescr.