Started getting a down indication on an icmp ping to a remote subnet.
Confirmed the node was not down.
Pinged directly from the machine that hosts the probe.
Pinged with packets of varying sizes.
Pinged at different rates.
No failed pings.
Tried multiple times rechecking/pausing/unpausing etc.
The sensor did eventually clear itself after about 15 minutes.
This did not coincide with any outage or know network disruption.
The prtg system is running on a server 08 64 r2 instance under vmware with about half it's 4 gig ram free, cpu load never goes above 10% - there is plenty of bandwidth.
An occasional false positive isn't the end of the world - prtg is just an indicator after all - any actions should be predicated on an inspection after receiving the alert.
Still, I am wondering why a simple ping would fail like that.