Graphs erratic, but stable on MRTG server

I have a wireless link with a very erratic graph like:

but that same device being graphed by straight MRTG on another server looks like:

Also, notice how librenms shows it passing 80Mbps upload, but the mrtg shows around 10, which is closer to actual. Other links with the same hardware are fine, but some aren’t. What am I missing?

What OID is the MRTG graph polling?

Some things to check:

  1. You’re using snmp v2c or v3 to support over 125Mbps

  2. Polling is completing in time - See the poller time graph under health -> polling.

  3. Check eventlog for that device in WebUI.

Yes, I moved to v2c and it fixed it, thanks :slight_smile: