i have a server running FreeNAS under monitoring on Netxms. The host is always up and i can ping it from my pc or from the server where netxms is hosted , but "node down/up" alarm arrive to me...
If i check the status of the node, i see that many time the server is in state "unknow" or "critical" but i know that this is not true because i ping successfull the node all time from the server where netxms is hosted.
Moreover, i have actived snmp on the target, sometime it respond and sometime not...Else here, if i do "snmpwalk" from the server where netxms is host i get the MIB correctly.
I try to delete and recreate the node but nothing change.
Why the server status is not correctly detected?How can i fix?
In attachment the line chart of the status.

Thank you