I've noticed that some of our SNMP sensors repeatedly give no response errors/warnings that I believe to be false negatives, and I was wondering if anyone had any ideas to alleviate this, as I feel these specific monitors aren't useful in any sense in their current state. I will note that these are Linux boxes that are giving the errors, and our Windows servers/clients have not had similar issues. It also seems to be the same devices every time. I'll attach some screenshots of our 2 hour graph to show just how intermittent it is.
Some things we have tried:
Shuffling devices to new remote probes for load balancing
Increasing the SNMP timeout to various amounts (I've tried anywhere from 5-60 seconds, but the devices fail to respond for minutes at a time, so I'd have to set realistically a 15 minute timeout to avoid 90% of these warnings and errors, which is far from ideal).
Any advice is greatly appreciated!