Regarding the "Dropped Packets" on Grafana

[InFi_Bebe_]

Hello, Group members

I came across the working group through https://blog.sflow.com/ and would like to get assistance in visualizing dropped packet information in Grafana. Currently, all other metrics appear to be working fine, except for the dropped packet metrics.

After investigating, here is what I’ve found across the different containers:

1. http://localhost:8008/app/browse-drops/html/index.html: I can see the dropped packet information correctly displayed here (e.g., reason, stack, ipsource, ipdestination).

2. http://localhost:9090/targets?search=: The state for the sflow-rt-drops target shows as ‘up’, but unlike other targets, no data is visible for this endpoint.

<No data with white page>

3. http://localhost:3000/d/fc5840ce-c59d-4145-9b20-1a5b3f8931da/sflow-rt-dropped-packets?orgId=1&refresh=10s: Due to the lack of data from step 2, no information is being displayed on the Grafana dashboard.

Is there anyone who can help guide me on what I should check or adjust in this situation?

[Peter Phaal]

Thank you for the detailed information! I think I see what is going on, the 'node:inputifindex' and the 'ifname:inputifindex' keys require that SNMP is enabled for the sFlow-RT container (-Dsnmp.ifname=yes), or a topology is installed, https://sflow-rt.com/topology.php. The easiest fix for now would be to change 'node:inputifindex' to 'agent' and 'ifname:inputifindex' to 'inputifindex' in your Prometheus scrape script (and restart Prometheus container).